If you're talking competitons, might move this to the comp thread.
You going to compete this year?
Well, you can't get the parts except through CS, especially if you expect to keep any warranty. Traeger sells them, as replacements to traeger owners.
Might be some odds and ends you can get from others. But if you start mixing and matching, you can't guarantee the parts will fit/work. But that's just me.
You can pretty much look at your machine and see the working parts and have replacements.
There have been a few posts about parts that have stopped for whatever reason, at contests,
Here's a start:
Controller (had one with an electrical problem during an electrical storm)
Igniter (burned one up with a backdraft fire)
Auger (no problem)
Auger pin (no problem)
Fuse (no problem