Really nice setup, pe reivers! [&:] It's the first hybrid plane I see (kind of a flying Pryus)!
Back to the topic, at home I use a regular drill with a starter cup. The cup can be bought alone in many shops, along with the rubber, or can be easily machined if you have the tools. For the axle, a simple screw and a nut works great. I tighten this to the drill so the cup is touching the chuck; you have enough clearance and it's rock solid.

I'm searching for an old cordless drill for the field. Should not be difficult to find, they're quite cheap and people soon replace them.