Irglnman, IMHO, the sheeting that shifted was probably not the fault of the GG, chances are it moved when you put the weight on top. (Ask me how I know:-) If you are only using 30# of weight to put pressure on the skins to the core I feel that you would be very dissappointed in the result if you used epoxy. When I used weight to skin wings 100lbs+ is what I used. This sounds like alot but now I use vacuum and that is easier to control and is a more pressure that is evenly distrbuted over the surface of the wing. Once you try vacuum you won't want to go back to weights. (That is till you get a bag with a leak) That's why I still keep the weights around as a back-up.

Also I will use masking tape to hold the skins in place before I draw a vacuum or put the weights on.

Thanks for showing your build, Good luck.

MTY