I suggest discussing the shop's silver soldering it back together, and letting them tell you if/why another method would be better; then decide who does it and how. I would hope a good shop's workers would have more knowledge than I, even though I've dome lots of odd repairs using many methods and materials. Later, you can find some old worn out parts to break and repair or just build up when learning the procedures. Not doing this right has too many consequences to make taking a chance worth the possible satisfaction or savings for doing it yourself. I still think it's worth a call about the HT epoxy, particularly if you find the broken piece and it still fits together well.