[captain harlock]

The main difference between the C50 and B50 is the extra large heatsink that makes it look like a 2230 or 2240 Lehner motor while infact its only a B50L or XL in another body, another morph. Also, Coolhand, these rates are only theoritical ones, but not rated under real conditions. The C50 MAXX for example, as MetalMan clearified, is but a B50 8L or 8s inside a huge heatsink.