I?ve had 3 cables fall out in 2 days. I?m using 1/4? cables, Aeromaine collets for 8mm shafts.

I tighten them as tight as I can and still they manage to fall out. I silver braised one Shaft to see if that corrected it, but no-go. I don?t recall Octura collets giving me this much trouble.

Any ideas on what I did wrong?
Thanks doodes!