Mick, I don't think the blade pitch depends on the tilt of the rotor. I'll go for 2 degrees negative to start with.
Chris: I've read post 973, thats why I had this question. Please define 'a thin piece of wood', how thin is thin? 1mm? 2mm?
I'll try some stuff to get to 2 deg and see what happens. I was just wondering if someone knew which angle works, and go from there.