Marine Tex is fantastic stuff and a lot of gunsmiths use it as a bedding compound. I have several McMillans that were bedded with Marine Tex and they are as solid as a rock. Only potential problem with it is if you don't work with it quickly, it hardens up and removing the excess can be a real PITA. Marine-Tex when fully cured, can be drilled and tapped. They use that stuff to repair transoms on boats so you can get the idea how fricken strong it is. I don't recall exactly how long the "working time" is with it and, IMO, it's probably better left to those who are experienced with using it. As you know, it's a two part epoxy so it'll say on the can how long you have to work with it before it starts to cure.
