sorry was out of town for a few days with the kids.
you can put the holds anywhere you want. they are made to fit about as far back as you can go. on a round nose they will fit pretty much all the way back and clear the exhaust, you may have more room forward with a square???
yes- do put 5200 all over the back of the sponsons. or a thickened epoxy.
I hold a pencil 90 degrees to the side of the hull and trace the hold outside. you will need about 3/4 to and inch inside that to screw the hold to. so make another line that far inside. cut that line. use a saw to cut the foam at a 90 all the way to the outside, use a prybar to remove foam, trim as needed to fit hold. drill, countesink, screw, drill a hole in the top of the gunwhale, poor 2 part foam in and glass it all up. whew!
done yet? :jester: