I just got a Rampage Rally roller ( thanks Rodney). I install a Zenoah 26 took it right out, and ran back to back 50-51 mphs. Now I want more. I am not new to RC but I am new to the Rampage gearing system. I'm currently running 33/27 and 31/19. What gears should I look to get for speed? I'm looking for 60 mph at the least. Thanks in advance.