I have the novak 5800 setup on my HPI Rally, I have a 90 tooth spur, and a 31 tooth pinion gear. The problem is the gears are to big, If I try to put the pinion on, it won't fit. There is not enought room for both gears on this setup. I could go lower but I don't know what would be best as far as gearing goes. Looking for a nice spot, between speed, and power. Any help with this would be Good.