I guess it boils down to your faith in your ability to do the necessary mechanical work. No way I'm letting a Triumph "technician" work on my bike. I've read WAY too many horror stories on this list about these "trained mechanics".
Case in point: when I had my starting troubles, the VA dealer near me was supposed to order a starter solenoid. Instead, they ordered a relay. After a 50 mile drive to pick up the wrong part, I bought it anyway as it was only $11. On the way out of the shop, the mechanic asked if I had the solenoid. When I told him a relay came instead, he commented that I wasted my $11 as there was "no way" it was the relay. Went home, figured since I had the relay I'd pop it in. Never had a problem since. Yeah, they're "trained technicians" and will check for safety concerns. Sure, and I can fly. Can you tell I don't exactly trust these guys? <g>
Btw, I'm still waiting for that VA dealer to call me and tell me my solenoid and shop manual has come in. (October)