1. Either you or them. You're cheaper than they are, but if you gots moneys to burn knock yourself out. To accomplish re-indexing, relieve them to full droop then pull them out of the LCA's and turn them a couple teeth and reverse istall. Don't recall which way to turn them, but if you look at what you're doing, just use common sense.

2. Tell them to set camber to zero. They only have the specs that are in the machine. Unless you got a really old guy who knows what he's doing. In that case he'll know and it's probably best to not insult him. Unless you like doing u-turns without your consent.....