UPDATE Alright here are some measurements, please note that i own a 15 bucks calipher so nothing extremely precise, and for this i tried to include other types of measurements as well.
NOTE: The bottom of the samples is raw brass so it's ugly (in the pics and irl).
TL;DR: Measures seems to match the file. The kerf seems to be calculated automatically, otherwise the holes of the samples should have been bigger of the holes in the file. e.g. 14mm on file should have been 14.1/14.15mm on plate if the kerf wasn't calculated, but this isn't the case. On a side note, after measuring all the holes there are some points where the lines are 0.05mm/0.1mm smaller than the file, i guess that's machine error or different kerfs while the laser is moving on different types of lines or any deviation of the brass sheet, nothing that would affect the final product or that you can see, but still that's what i calculated with my poorman calipher.
Also i did fit different type of switches and all fitted correctly (note the base of the switch without the clip is around 13.85mm), the fit was tight but not too tight.
Also the stabilizers holes that i did 7mm to be sure, fitted correctly with a super small gap, stabilizers are around 6.7mm and needs around 6.8mm for a supertight fit, while i have a gap here.
Afterall, i think the cut is on point, Kerf seems to be automatically calculated. Here are some pics.
This is 4.20mm on my file
I wanted to fit the kbdfans blockers inside the plate, the blocker that was 13.9mm at the bottom fitted in every hole, the one that was 14.01/14.05mm didn't fit in every hole. I suspect the holes must be 14.05mm to fit correctly every kbdfans blocker without pushing too much (the base of the blocker seems to have a variance of max 0.15mm on different blockers).
A comparison with KBD75 R5 plate, seems equal, maybe there is a very small difference but i still think kbdfans uses 14.05mm holes (at least that's what i calculated) and in fact the KBD75 plate seems to not be very tight (a bit loose if you ask me)