Another repair using nail + epoxy method on G1 re-issue Optimus Prime: This toy has been dropped a lot already but has stood strong...until now. The smokestack of all things broke. Repaired this similar to the rifle above: Various mods (of mods), custom stuff However, for the smokestacks, I drilled a slightly larger and longer hole tunnel to really make sure it won't break again. Started with a 1.5mm drill bit and carefully drilled a hole tunnel in both pieces. Then used a 2mm drill bit to make the tunnel wider. Used a longer and wider nail compared to the rifle above. Made a tiny batch of 5 minute epoxy. Used a nail to put epoxy in the hole tunnels and end pieces. Held together in place until it set. Still need a day for the epoxy to harden enough after curing. The pieces have to be held together manually until it cures since it's epoxy. This time, the epoxy really wanted to make the pieces come apart, so can't just leave it alone. Almost ironically, the smokestack is now stronger than what it was before.