I have a pair of A.P.e. cam gears for sale they are made from 6061T6 aircraft quality aluminum, they will fit all B series and H series motors, they have 6 bolt down points to prevent slippage, they are more accurate than skunk2 gears with a 1:1 ratio for timing marks in degrees unlike skunks 1.5:1 ratio, they weigh .2 kilo grams each gear, they are hard anodized for strenght and beautiful finish. The lowest I can go on these gears is $180 for the pair. I accept paypal and buy must pay shipping and handling. For more info please email BRANDON@TEAM-EVOLUTION.NET