Plumber: your point is well made! Some of the time, I, too, build removable servo trays. Maybe I have too many 'builds' going at one time. Nevertheless, I still think a socket head screw is far easier to remove. As for JIS, I never heard of it-can someone verify this? If this is true, why don't they print that somewhere-or did I not read the instructions. There's Torx, allen, slotted, phillips and how many others. Come on, this is supposed to be a hobby.