Hi ,

i'm glad to read that u like the machine!
there is a lot of time and love in each machine i produce ,
that being said i would love to help you out
i've had this issue in the past here and there , but most of the times it was because of the bands being old or the bands are getting chewed by the needle going in the tube with the band on it (don't know if this makes sense)
try setting your stroke all the way down , then adjust your grip to your liking , and tighten , then the band only goes up and back down , and no longer in the tube

hope this helps
if not shoot me a message on facebook or
[email protected]

peace

Jack