If it has that much epoxy in there, you may, if done carefully, drill and tap the epoxy too. It's soft enough to take a tap but solid enough to hold. Or, pull a blind nut right into the epoxy.

When I was in training, my Nexstar had a bit of a run-in after landing.. with a berm along side the runway. It veered over and smacked into it. It tore out the main gear on the left side. If you are familiar with the Nexstar, it has a plastic gizmo that the gear slides into and clicks into place by tabs on the plastic mount. That broke. They (Hobbico) stated that it was a safety feature but also says that if you want to replace it, you have to buy a whole replacement fuselage. Ah.. a catch for sure.

I ended up putting a small piece of 1/4" ply backing and poured epoxy in there to hold the gear in place. The gear was never going to come out as it did with the original setup, but neither was it going to break any time soon. And if it did, well, then it WOULD be time for a new fuselage.

Moral.. don't overbuild or you will end up tearing out the bottom of the fuselage. Remember that every chain is only as strong as the weakest link... ie... and all that building around balsa, even if teathered to ply, will give at the weakest point if hit hard enough.

CGr.