[cmacd123]

Which canon model does this? (sounds like some inner electronic glitch/malfunction)
I use a 1n, 1v and had a 3 but sold it and they all worked fine with the reused factory cassettes. (I taped the bulk film to the last few inches of a used up factory load)

Are you worried the winder will rip the end if you tape your bulk loads?

1) Original "elan"
2) I have no luck extracting the leader through the cassette felt, and the caps don't go back on the factory loads after I pry them off.