James left a few critical details out, such as the length of the bar
James will post pictures and full specs soon, but it is about 950mm tip to tip, so i would say this is not for the total beginner as this thing is dangerous if not used correctly!
It was built around a 2500W angle grinder, using the end housing and gears. This was all mounted to a lightenened alminium mount with 4 large rubber dampners to adjust the angle and obsorb some of the shock from destroying one of our kits. These can be removed and the unit solidly mounted.
The motor we used to power it was a small motorbike starter motor, which we tacd to around 1000rpm at the bar. I would have though a mag would or similar would be a nice choice for this gearbox, maybe a big brushless.

Just to be clear, this is for the spinning bar, gearbox and mounting. There is no switching unit or power unit of any form.

(Message edited by Grant_ploughbot on February 05, 2009)