The raw capture file
Both units log every accepted strike. You leave with the full table, not a hand-picked average that flatters the club we happen to stock.
Inside a sessionNorthwest Indianapolis · Two Bays
A number is worthless
without the conditions behind it.
Most fitting reports hand you a carry figure and stop there. We record the air, the ball, the surface, and the capture method that produced that figure, then hand you all of it. If you ever want to argue with our recommendation, you will have everything you need to do it.
Condition Sheet — Sample
Capture pairDoppler + Optical
Bay air temperature68°F
Barometric pressure29.6 inHg
Reference ballPremium urethane
Strikes kept / taken11 of 16
Every spec we issue carries a panel like this. Without it, a carry number is a rumour with a decimal point.
The condition sheet
Temperature, pressure, ball model, mat or turf, and the discard count. This is the page that lets a number travel to a different day and still mean something.
What we measureThe build spec
Head, shaft, tip work, length, lie, grip, and swing weight, written so any competent builder in the country can execute it. Yours to keep whether you order here or not.
Component lines
Why we run two units
One system watches the ball. One watches the face. Neither is the whole story.
A doppler unit tracks the ball itself and is excellent at flight and spin decay over distance. An optical unit photographs the moment of impact and is excellent at club delivery — path, face angle, strike location on the face. Ask either one to do the other's job indoors and the error bars widen fast.
So we do not choose. Both units watch the same swing, and when their outputs disagree by more than a set tolerance, that disagreement gets flagged on your sheet instead of quietly averaged away. Sometimes the disagreement is the finding: a shaft that produces clean ball data but visibly inconsistent face delivery is a shaft you will fight in September even if it looks fine in the bay in March.
This costs us time. A paired session runs longer than a single-unit session and the calibration routine adds fifteen minutes to the start of every morning. We think that is the correct trade.
Session menu
Six categories, each with its own capture routine
A putter session and a driver session have almost nothing in common except the room they happen in. We run different units, different ball counts, and different acceptance rules for each.
Driver
Head, loft setting, and shaft tested against spin ceiling and descent angle rather than peak carry on one lucky strike.
Driver sessionsIron set
Set-wide gapping, dynamic lie, and shaft consistency from the long end to the short end. The most common reason a bag has a dead yardage.
Iron set sessionsFairway wood
Off the deck first, tee second. A wood that only works on a tee is a club you will use four times a round at best.
Fairway wood sessionsHybrid
We fit the gap, not the category. Sometimes the answer is a hybrid, sometimes a driving iron, sometimes a shorter wood.
Hybrid sessionsWedge
Bounce and grind chosen against central Indiana turf and the sand in the bunkers you actually play, not a generic chart.
Wedge sessionsPutter
Roll quality, launch, and start-line dispersion measured on a calibrated surface with a separate capture rig.
Putter sessions10Years in the room
2Capture systems per bay
16Strikes per club, typical
0House brands we push
The Indiana problem
Half the fitting year here happens under a roof.
Central Indiana gives you maybe five months where an outdoor session is genuinely representative. The rest of the year, anyone fitting you is working indoors whether they admit it or not. That is not a weakness — indoor capture is repeatable in a way a windy Tuesday at a range never is — but it only works if somebody accounts for what the room changes.
A heated bay in January sits around 68 degrees while the course you will play in April sits at 52. Ball speed, spin, and carry all move with that. We hold a documented normalization model, apply it to your numbers, and print both the raw and the adjusted figure so you can see exactly what we did and by how much.
From May through September we will happily take a confirmation session outdoors at a partner range and re-run the same clubs. Most golfers find the two agree closely. The point is that you get to check.
Session shape
Five stages, roughly ninety minutes
Nothing here is improvised. The order is fixed because changing it changes the data, and we would rather compare your February session to your next February session than to a different procedure.
Full walkthrough-
Baseline on your current clubs
Before anything changes, we capture what you already own. No baseline, no evidence of improvement.
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Conditions logged
Air temperature, pressure, ball model, and surface written down at the top of the sheet.
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Directed component swaps
One variable at a time. Head, then shaft, then length — never all three at once.
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Confirmation block
The leading candidate gets a fresh, uninterrupted block of strikes with the same acceptance rules.
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Spec written in front of you
We read it back, you keep it. Ordering here is optional and always has been.
Golfer reports
What people said afterwards
Collected by email in the weeks after a session. Lightly trimmed for length, never for content.
I had been told twice that my driver spin was fine. Impact Fit Lab showed me the two units disagreeing and explained why the earlier reading was probably optimistic. Changing the shaft tip section took about 600 rpm off and my ball stopped ballooning into any headwind.
What sold me was the condition sheet. I took it to a builder in Ohio when I was travelling and he said it was the cleanest spec he had ever been handed by a customer. He built it exactly as written.
My gaps between 4-iron and 7-iron were nonsense and I had no idea. Two clubs got re-shafted, one got bent a degree, and one got sold. Cheapest fix I have ever made to my scoring.
Lab notebook
Recent entries
Working notes on measurement, mostly about the gap between what a screen says and what happens on grass.
Indoor vs Outdoor
Why Your Bay Numbers and Your Course Numbers Disagree
Six mechanisms that separate an indoor carry figure from what your ball actually does in April.
Capture Hardware
Doppler and Optical, Side by Side in One Bay
What each system genuinely measures, what it infers, and where the inference gets thin.
Data Handling
Which Strikes We Discard, and Why We Tell You
A discard rule you cannot see is a discard rule you cannot check. Ours is written on the sheet.
Before you call
The four questions we get most
Longer answers, plus another dozen questions, live on the questions page.
Ask us something elseDo I have to buy clubs from you?
No, and we do not chase you afterwards. The spec sheet is written to be executable by any builder. Roughly a third of our sessions end with the golfer ordering elsewhere or adjusting clubs they already own.
Is an indoor fitting actually valid?
It is valid when the room is accounted for. That means logging conditions, applying a stated adjustment, and telling you what was adjusted. It is not valid when a bay number is handed over as if it were a course number.
How many swings will I have to hit?
A single-category session usually runs 60 to 90 accepted strikes across all candidates, spread over about ninety minutes with real rest between blocks. Fatigue corrupts data, so we build the breaks into the schedule rather than treating them as lost time.
What if my current clubs are already right?
Then we say so and you pay for the session, not for a build. That outcome happens more often than the industry admits, particularly with irons bought inside the last three years.