I've been to a tech once to get my lil59 installed a few years ago. No tip.
I hate giving tips, to anyone, period. I have a hard time understanding why I should pay someone extra for doing their job. Do you tip your garbageman? What about the salesclerk in the clothing store?
I'll probably never understand the whole thing unless I start waiting on people. But then I think it's a matter of getting a tip and being angry at everyone else who doesn't. What would the world be like if we never started tipping in the first place?
Ignore me, I get heated up when the topic is tipping people.