2018 ec300 squish

[Cox76y]

So I finally got around to checking my squish. Im on my 8th plug now and have just changed to amsoil dominator to hopefully help me with a bike that is jetted fine but spooge city n keeps wrecking plugs. Anyway, I think the major culprit is my squish, which is at approx 2.1mm by my measurements.
Hopefully Ill get to send the head down to get cut soon but im not keen to have to take the barrell off to check crown height of the piston as suggested by someone else in this forum as there is supposed to be 2 different types of pistons getting used.
Is anyone aware if there is another way of finding out which piston was used without having to remove the cylinder?? Surely a record was kept somewhere along the production line.

thanks

JC