Tom
I'm at 4 1/4 " and as soon as the Snow get's off my Land I'll move it 1/4 inch back further. Right now it's extremely stable, If you want a picture of the controls I'll send one to you.

This is with a YS63 12 X 7 APC. with 25% fuel it's turning 12,3. Going to cut back to Cool Power 15% and a 12.25 X 4. Should get about the Same R's.

Have Fun
AMA 6518