The MAT124 and the MAT124G can use both 120 and 220 film. The pressure plate is simply moved to one position or the other. The MAT, MAT-EM, MAT-EL and 12 use 120 film only. The 24 or MAT24 uses 220 film only.
On mine, I never used tape or rubberbands. I just put the sync switch in the X position and left it there.