Thanks, i spent some time with conversion charts and calipers and ended up ordering m3.
Going to pull the coin mech today as one of the coin return doors is wedged open and it's pissing me off. First time with one of these but it looks reasonably straight forward.
I want to replace all the gal screws with black on the plastics and backboard where the eys are, then replace all the white acorn nuts with black on the orange and black plastics and leave the white ones on the 3 white plastics.
I know it's not stock, but a little detail that i think will improve it for me anyway.