hey all. I have a pair of RollerTrons I bought used. They work perfectly except for the fact that the rollers eventually work themselves loose after a couple hours of use. They actually fall off the stem and either get caught in the mechanics, or crash to the floor. Needless to say, they're both getting banged up quite a bit.
The stems that the rollers attach to are not threaded so there's no way to actually attach the rollers permanently. They're only held on with friction.
Has anyone else had this problem, and if so, have you figured out a way to keep the rollers in place? I've tried various non-permanent things such as tape, gum, toothpick shims, etc.
any ideas?
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