Originally Posted by TenSpeedV2

Absolutely not. If it is included then it is included. No way anyone would even think that you would tip on something like that. I work in a shop and not once have I ever expected a tip. I have gotten them though, and it happens more than I thought it would. Did a rack and fender swap from a moms bike to her daughters bike. It took way too long and we had to make a few things "work" but in the end it was exactly how she wanted. Someone more skilled would have done it much faster but they didn't seem to mind After they paid and left, turned out that they left me a $10 tip.