Thanks Eduardo, it'll make nice light reading!
I know I said I'd get a parts list together. I made one a little while ago, but haven't been able to get to it. Now that I can, I think I need to have another look at all the sizes, weights ect. The basic idea will be to build a wedge robot which can be easily upgraded to the robot I want it to be. That means designing it to have an electric flipping weapon, and then taking that weapon away and making it invertible. The problem is, with the shape I want to use, it'll probably rear up when I accelerate when the robot's upside-down. I'll figure something out though. It'll hopefully look something like Satanix, but with a much larger single front wedge and without the spikes. Not a great description, but I'll try to draw something (I can't stand SketchUp!)
Finally, I said I'd upload the images and videos soon. Well, I now don't have access to the images, and for the videos I tried some 'dynamic' filming (so everything's a little shaky) and, having an 'audience-eye view', the black bars inn the joints in the arena get in the way sometimes, and there weren't many in the first place, because I forgot to charge the batteries the day before. I'll still upload a couple, but there's little point in uploading them all.
In other news, I've started taking an old RC toy truck to bits. I know the motors will almost certainly not be powerful enough when I finally break them out, and the 9.6v NiMh battery pack probably doesn't work anymore (it's an old, little used truck) or won't be enough, so I'm doing this for practice more than anything.
Quite a long post full of not-very-interesting bits, but things will pick up soon if I get my arse into gear.