I use a bit of fiberglass cloth at the rear of the tangs, glass bed the entire action and of course fill the cracks with dyed epoxy. Epoxy ,just mixed, can be thinned with common isopropyl
alcohol. Add tiny amounts until you get the viscosity you need. It will harden on time and strength won't be bothered. I use it to wash off excess epoxy from the exterior of just repaired stocks.

bill