[daltore]

Instead of using epoxy, I would suggest J-B Weld. It's very similar to epoxy in usage and waiting time (regular epoxy, not instant, it's about 6 hours to handling time, and 15 to full cure). It's basically a specialized epoxy for metal, which both chemically bonds any kind of metal (similar to Loctite threadlocker) and hardens into something similar to ceramic. It will probably hold better than epoxy. We used it to convert a 125:1 BB gearbox into a 25:1 and it worked great. You clean off the grease between the two plate's your welding, mix a little of the two compounds (and I do mean a little, doesn't take much. Make sure everything is well covered, but you don't need to slather it on), apply it to all of the gears, top, bottom, and between all of the teeth meshings, wait 15 hours for it to cure (a small heat source like a light bulb, heat lamp, or space heater decreases waiting time), and grind off the teeth of that stage. Probably the best combination of simplicity and strength. Not to mention, the J-B Weld doesn't harden in its container like epoxy does. J-B Weld can be bought at places like Home Depot for about $5, which is about as economical as epoxy, because you don't use as much.