i was under the impression ( after conversations with ken ruth
who does conversions of medalists from 620 to 120 )
that either the paper or the film base of 620 was thinner than 120,
so film is likely to get "bound up" ..
do tourist cameras and others that take 620 film have the same problems or
is this a situation that may be more likely to happen just with medalist cameras because of their design ?
My friend always respool 120 to 620 into a Kodak Duraflex with no problem.
[ Insert meaningless camera listing here ]