A few of the very good people at CB have seemed to disappear...Mark blew out his ACL and did something to his wrist in a race, so he had to get an operation, and was out for the season.
And Tom wanted to "see his kid more" What a loser
Will is a nice guy, and would probably be my next choice.
They also have a pretty good stone grinder at CB..however I think there closed for the season.
As far as when it is time to get your skis ground, if they base is not flat (excluding atomics) then you should have them ground. One of my volkls is base high and edge high at the same time, the other is just a little base high as I recall...That is something I can tell just by looking at them. However if you have a truebar you should be able to hold it to your ski and see if its flat.
Atomics are a little convex (or is it concave?) (edge high) at the tips of them, and I think that the warenty is void if you have them stoneground, so I wouldn't try to remove it...