It uses the electronics and actuators from 8043, and the wheels from 8264.
Here is a video which explains how it works, with some basic instructions:
This model was built and refined over a period of one year, although only with some handful of hours per month.
The transmission was fairly easy to finish, but getting the boom/tilt geometry correct took a lot of trial and error. It's still not perfect, I would have preferred that it tilted further backwards in the lower boom position. But it works quite well.
The connection between the chassis and the superstructure also took some refinement. It needs to be solid, and well integrated with the transmission and boom/tilt mechanisms, to avoid a too large footprint.
Also, the weight balance was a challenge. Originally, I wanted to place the battery box further back, but the vehicle would tip backwards when accelerating. Hence, both the drive motors and the battery box were put as far forward as possible.
Edited by fredrigl, 04 July 2012 - 01:15 PM.