RE: Viper firewall broke loose.
Hi Duane, what I have done in the past for my firewalls is to use strips of 1 or 2 oz cloth going around the sides, across the firewall and from the top to the bottom. 2 or 3 layers is all I use followed up with an extra layer or 2 in the corners. I know some guys like to use a chopped fiberglass mixture in some epoxy for the corners and that works good too. As for the engine mount bolt holes, put a drop of some lite oil on the screws and screw them in all the way. When the epoxy has cured they will pop loose when you remove them.
Other options would be to glass on the outside of the nose and to use round tooth picks to pin the firewall to the sides of the fuselage.
BV