That's the thing to weigh, TSC vs Dealer, cause as Rivets pointed out, if you break, the Dealer you did NOT buy from is not gonna squeeze you in, ahead of his loyal customers.
My Z was within 1 week of warranty ending, & I got a valve tick on my Kawasaki engine. I wanted to be sure it was not anything more. Talked to my Dealer that I bought from. he said he's backlogged 1 month. But get it out here & he'll get right on it so I'm covered (if necessary) under warranty. That's Service !!! You think TSC will do that ?
If was simply a valve adjustment, but I played it safe. & because I keep mine very clean, he promised to keep it inside till I pick it back up as well..And that is why I'm a loyal customer.