RE: Radial Mount on 2.15
Correction:
I just received the parts. It should be 151mm from back of radial mount to front of prop drive washer.
The partnumber includes 4 M4x15 screws, the required allen key and instructions.
The 2.15 will fly your plane very well, turning an 18x10 Mejzlik at about 8000 rpm and 20x8 around 7300 rpm