I've only made 3 FG bows, but the thing that has helped me most is pegging the riser to the form by drilling a hole thru where the sight window will be cut out. I use a short piece of metal coat hanger to peg it down and rub a little paste wax where it enters the form to keep the epoxy from sticking to it. Then I start at the fades and tape the crap out if it.
I didn't do this on my first attempt and everything slid and ruined the bow. The last two turned out great, didn't move at all.