Yes belt driven at first stage anyway. First target is to get car on the road with that 1.2 TDI. There are million mods long list what will be done and tested...
I have made some calculations based and cd targets and BSFC map.
Looking good I dont need very low drag to reach that 3 liter target that means I migth not even have to make a "boattail" to the car to get there.