Here is something to ponder on. Belts vs Shaft (HPI)

If HPI truely believed in their shaft design (i.e. RS4-3) why did then abondoned this design in their soon-to-be released racer, the R40?

Look at the R40 CAD design. How does the layout look like? It looks like the MTX-3, V1RR, 705. Look at the pivot ball adjustment, droop (I think), 3-belt design, etc.

Looks like it is the first car they will release that will complete with the 1/10 TC mugen, Kyosho, Serpent, Trinity G4, etc racing quality cars.