It appear many on here use a knobby tread 4.8x4x8 rather than the ribbed ones like the promos use. Is there a reason? I copied the LLF mini axle drawing provided . I came up with about a 5.2 degree angle of rear wheel cant. Is that right? Does any one prefer any more or any less? I started building my mini 2 days ago. It's really different than anyone that I have seen. It is monocoque construction with an enclosed front fuselage and front wheel. Don't know if it will work but am willing to try something new.