Blake posted:When circuit boards in older MTH/lionel locos burn out, have a few that are put into a box and put away, eventually I'll figure out how to fix it. On tinplate trains I hate the way some of the bodies are fitted together with slot and tab, I'm always worried that they will break off (it's happened before)
Try annealing the tin tabs a bit with a soldering iron before disassembly to stop/slow the "work hardening" from repeated bends of the metal. When possible, twisting tabs seems to work better, and without snapping on a fold too.