Quick progress update:

Everything except the electronics is pretty much done now and so far it's gone surprisingly smoothly (not looking forward to wiring it up though).
Hopefully these images will give you an idea of how the robot will run along the ground

http://i.imgur.com/qtbUygH.jpg
http://i.imgur.com/rNrM5SR.jpg
http://i.imgur.com/3hjTmLl.jpg

Wiring shouldn't take too long as lf I don't run into any major problems, after that all that really needs doing is to buy some bike tyre for the wheels!