The two bolts on either side match up pattern wise from puch to tomos. But you gotta do a slight bit of fabrication i.e. cut some material away for tomos to fit on puch. But if you have the swiss cheese frame that can be sketchy because then there isn't enough material left in my opinion if your going to use a tomos motor without kick start. (because you put all your weight and torque on the motor via the pedals) and since thats the case with mine I just had brian add material and now its beefy as fuck.
Right now you can bolt up either tomos or puch without any qualms...
The only snag I ran into was the chain scrapping slightly on the frame but thats fixed now with a slight bit tweaking.
p.s. this is an idea I got from Bainsworth in Richmond. I saw his bike and liked it so much it inspired me to build one similar. He uses a rigid freespirit though and mine obviously will be a complete rigid pinto.