Can anyone confirm the thread pitch on the M3 flathead screws used on the machine? They're called out as M3 sized screws, but when I check the threads to metric sizes it doesn't seem to be metric. 1mm threads are the closest, but after a few they start to get off track. I found that 24 threads/inch was basically an exact match which seems odd on an M3 screw. Just wondering if I'm missing something.