[Graham]

Hi Graham,

In Group 1....If I have a resin cast body with a 3D printed chassis then it does not qualify for either group A or B as I read it. Is that intended? Many of the 50's bodies on the list will be cast resin if available and the easiest method to scratch build will be a 3D printed chassis as B&W is excluded.

Mark

Yes now I look at it again it does sound ambiguous, it was meant to imply that 3d chassis can be used (ie plastic chassis) for for Resin/fiberglass Cast models in Class A. 
But I agree it does not mention specifically 3d chassis (as in the other classes which refers to them)  But I wanted to differentiate models which might have a performance advantage (chassis type) over a straight forward fixed resin or RTR chassis type.  

So in that case I will re-write the definitions for Class A & Class B.