10 x 6 on a Magic Extra??!!! NO way dude ... Most people go for the APC 12.25 x 3.75 but you can try the APC11x5, the 11x5 is brilliant. The engine spools up faster and you get higher revs for me that gives me better throttle control for a prop hang. I tried both props out on my TT Spirit 3D with a TT46 and I found the APC 11x5 more fun. Test both props out