Getting a good STONE GRIND on your snowboard?

Has anyone had luck finding a shop that can put good texture back onto a worn high quality base?
When you have a quality base, the manufacturer pretty much solely recommends a stone grind.
Most shops either do not have a board width stone grinder or do not recommend using it. The excuse I have heard and experienced is that snowboards are rarely perfectly flat on the bottom and the grinder will tend to miss some spots. Also that the board width grinders are very expensive.
Then again, I`ve also had some shops offer to put texture on the base with a drill brush-like thing or an inflatable sander that puts texture on the base and better conforms to the board. ?!?
Anyway, what`s the deal? How should I get my base tuned?

dumb question or not, I`m asking.
Would it help if you took your bindings off for a few days before you got the grind? Some boards have little areas that are `pulled in` by the screws on the bindings, so if you would take the bindings off for a few days, those areas might come back out and you would be able to get that area ground evenly with the rest. anway, just a thought/suggestion...

yeah, great suggestion, actually. I do that for that exact reason. i`m told that due to the width, its still rare to find a perfectly flat bottom. heck, if someone will grind it, i`ll take it in! i`m just having trouble finding someone who grinds snowboards...i`m getting a lot of excuses. maybe its just the shops way of saying, "we can`t afford a board grinder, how about a nice belt sand instead?"

properly messed up one of my wife`s snowboards. They ground away about 2/3rds of the edge at the very tip and tail, which in turn led to the base separating away. Since the board had been improperly maintained and that led to the problem in the first place, the manufacturers warranty was voided.
I epoxied it back together and it makes an excellent rock board now.
I have literally starting asking shops to show me an example of their handiwork before I`ll let them work on my boards. In fact when I need a base grind I drive 45 minutes, right past three shops that have stone grinders to get it done by someone I trust.