hmm... yea... I didn't think it would be that big of a deal to get your own parts. I do it all the time. My mech doesn't seem to care, I mean, I tell him that I have found the parts for $10 online, and he will tell me the cheapest he can get is for $20, so I buy the parts, and he installs them. I don't expect him to warrenty the part, but he does warrenty the labour, I don't see why other mechs wouldn't do the same...