I'd only recommend detuning if you're going to only use it for a park board. Here's what I do.
For a park board go with a 2-3 degree base bevel to keep it catch free and lightly detune with a diamond stone between the bindings. You'll want to keep a little edge for grip on the jumps. But anticipate your edges getting destroyed over the course of the season.
Don't expect to be able to rip on it after you've detuned. You'll lose a significant amount of edge hold.