I think I'm going to ask Freefly if they know if It is possible to use the Heden M21 (that's on the online shop) with a battery and combined with the finger wheel control.
You need a motor control system, I.E. the microremote. I would recommend the RT MOTIOn which also has a finger wheel option as it is a very reliable system - the only downside is the motors aren't as awesome as Heden IMO. Hopefully they release motor cables and firmware for compatibility.
but in that case, could I not better get the Heden 21 motor in combination with the finger wheel from RR, in that case, what would be the total number off accesoires that I would need?