I've made a few knives, although nothing with stacked leather. Spent alot of time on the bladeforums makers area, so I've at least read alot. Biggest thing about epoxy is accuracy in mixing, guessing that pile A is the same size as pile B, and then mixing together is not accurate. Generally bad experiences with epoxy are from this. That, and the stuff you find at the hardware store isn't that great.

I had a longer reply typed up, but the more I thought about it, the more I was unsure, so I figured instead of telling you something that might be wrong, I'll simply point you to bladeforums (go to the makers section, not any of the general areas), and ask those guys. Plenty of them do this for a living, and should be able to instruct you fairly well (search first so you will be at least partially informed).