I took the Life-Like GP30 shell and produced this Sketchup model .. call it Version 1. In red are the bits that fit around and against the mechanism. The blue should be as high as I can go – again based on the Life-Like shell. The white parts are simply 1/8″ outside the red.
I can’t get exact measurements. Close .. but not exact even with my dial calipers – so that is why I am calling this Version 1.
In February I will be getting a 3D printer – a Prusa I3 MK3. The plan is to print off this .. call it an ‘inner shell’ and then by trial and error discover what I need to change until I get a good fit to the mechanism – Version 2 or 3 or whatever. Once that is done I will use this ‘inner shell’ and build the On30 Road Engine shell around it.