It all depands on how you would like the plane to fly. I have always set all of my planes to 0-0 to start with, I like them to be fairly neutral both upright and inverted, with very little down elevator input. However, other pilots like to fly with more down ele while inverted.

According to a few of my friends with the Groovy, they are a bit on the tail heavy side to start with, all of them ended up adding weight on the nose.

Adrian