There is a wind speed above which the grass tee stops producing evidence and starts producing anecdotes. We picked a number, wrote it on the wall, and stick to it even when it costs us the afternoon.
Read the noteAcross a single ninety minute block, a golfer's address position moves further than most of the components we are testing. Here is what that drift looks like when you measure it rather than assume it away.
Read the noteOne thin strike in twelve can move an average enough to reverse the ranking of two shafts. The median refuses to do that, which is precisely why we print it.
Read the noteA bay collapses the target into a flat surface eight feet away. Golfers compensate for that without knowing it, and the compensation lands squarely on the address position we spent twenty minutes stabilising.
Read the noteEverybody agrees ball position matters and almost nobody measures it against a fixed reference. Ours is the lead heel, and the reason is that everything else on the ground moves.
Read the noteThe most valuable thing you take home from a block is not the spec. It is the record of how you stood on the day the spec was chosen, because that is what makes the next visit a comparison.
Read the noteEvery one of these notes started as something a fitter found themselves saying three or four times a month during appointments. Once an explanation has been given that often, it is more useful written down than repeated, and a golfer who reads it beforehand gets more out of the ninety minutes.
There is nothing here about which driver is best this year. That question has no general answer, and any studio that publishes one is describing its own component cart rather than your swing.
How a Block RunsSuggestions are welcome. Several of these started as questions somebody asked on the phone.
None of this replaces standing on the mat with your own clubs and finding out what your numbers actually do.