more than happy to help and learn, on themodel side, wheels and tyres for models can be made, I have made 1/43 car tyres in RTV black rubber, only need to make one and then cast from that, and to recoup costs you can make casts of all the bits and sell them on as a kit, my biggest problem so far has been getting reliable plans and sizes of the real thing but you dont have that issue
Paul
Southend