Stuffing a .60 into a GP Extra 300 .40 kit
With the paper pattern taped in a few spots, draw a few reference marks for where you want the color seperation, and curve the paper the best you can to the other side and do the same. Add more paper if you need to, the remove, cut out, and recheck. If it looks right, then transfer the pattern UPSIDEDOWN to the BACK or inside of the Monokote (the backing) and trace it with a permanent marker.