This thread piqued my attention ... And I turned out to be more organized than I expected.**
I own a plastic tank with adjustable spacing for the spirals, an FR "Special" and was even able to find it. (Probably hasn't had a film in it in forty years.) There is a metal clip between the reels with a point to snag the end of a film. With that in place, the reels don't quite get close enough, but by popping the bottom reel off, the clip can be removed -- and VIOLA!!!!
The spiral ribs are pretty deep, I have doubts I would want to bend a narrow film enough to wind it on, but it seemed it might be possible to just push it in from the end. I have no idea how likely it is that such a tank (or its equivalent) could be found these days (and I want to keep mine in case a roll of 127 appears.
Of course such manipulations need to happen in absolute darkness, so I would recommend NOT beginning with the film from your daughter's wedding or the shots from that balloon trip over Antarctica.
** My real challenge was locating an APS cartridge!