You will get a collection eventually!!
You can take off the pointer and set it to zero BUT you have no way to check calibration, except, with the evo if it starts at approx 11 bars its probable still good enough!!!
Take the gauge off . Pull off the outer bezel remove the back screw…. Its in pieces!!
Ade Smith. ACS Evo Leva v2. Kafatek Flat max 2, ssw 2024. Mazzer Philos, Craig Lyn HG-1 prime., WW key mk1.