Fiddled with my Fett- attached the rocket pack so it won't come off any more (putting it back on every time I picked him up got old really fast). I removed the plastic sheet behind the chest armor. Then I removed the armor tabs and glued the armor back in place. I also overlapped the vest in the back: so the Velcro actually went further than it was made to, then I glues it in place. Much tighter fit now. Still not sold that this is a better figure than the Medicom version.
Here's my C-3PO 12" Perfect Model Chogokin figure.
Expensive yes, but you get what you pay for.
I have two critiques with the figure. First- his legs aren't articulated that well at all. Secondly, his ankles want to give out under the weight of the figure.