Having been such a good boy yesterday, i felt R2 deserved a reward. So i bought him this:
Running him on a 7 Ah SLA was a little silly, only got about 30 mins out of it on carpet, and about 40 ish on the bricks, but they were quite bumpy. :)
Expensive, but looks like it will be worth it, Flip has one and it works great. Should fit, i hope. :) And should mean easier progress to thanks to a longer run time and faster charge. Also be nice to set-up the 2-3-2 with the battery on board to help with the balance.