[jerry56]

I have been pondering the same thing....As you have said the structure under the crane is 2 or 3 mm to narrow, and way to high, I've been trying to figure out how to cut those two pieces down to about 1/2 inch high then bolt some aluminum angle to them, I think this will give us the correct width to bolt up the WPL running gear... But I haven't figured out how to get in there and cut those two pieces down because the body is in the way...any ideas..
I'm planning a walking beam for the rear adapted to a set of the WPL metal "see-saws" as they call them... I'm also trying to avoid front out riggers.... that really complicate things
For motors I'm either going to try 2 300rpm 370 gear motors (one for the front axle and one for the rears) or a single 80 turn 550 with a 3:1 gear reduction and just power the rears....
As for weight I'm betting once it's done it will be really close to 25lbs easy...