I have also been dealing with a pot belly on Artoo. The skins are nice and tight around the top and bottom of the frame, however, the center area around the bottom of the utility arm carrier and the front vents is about .25" from the frame. This makes the Utility Arms appear recessed, even though they are flush with the outside edge of the frame. I have attempted to pull the middle tighter, but I can't seem to get that section to sit properly. I have the front vents on order from Marco and the panel that fits around those vent surrounds may pull in some of that area back into shape, or at least a not so noticeable shape. If this doesn't work then my options will be to:
A. Re cut the utility arm covering and splice it to the existing skins.
B. Order rough styrene and re cut the skins altogether. This was a 3 month process for me the first time around.
C. Order the laser cut skins from Andy.
I'm not really crazy about either options B or C. This may just be the nature of working with styrene as it is a flexible material. I can't really glue the material down to the frame as I would like to be able to remove the skins for maintenance if/when needed. I need to wait on my other part orders to arrive, but all in all, I have got some thinking to do.