Let's Make Robots!

Doing "something" with my encoder inputs.

I have a Rover 5 with the Dagu red back spider and motor controller. I have connected 2 encoders (one on each side) to the motor controller / red back spider. I found the encoder library, and tested it. I now have 2 working encoders and can read the value of them with the example sketches of the encoder library. So far so good.

Where to buy mini castor wheel?

I'm trying to find a mini castor wheel, I found this on ebay -> http://www.ebay.co.uk/itm/Robot-vehicle-Wheel-x-2-and-castor-x-1-Arduino-PIC-/270808707086?pt=LH_DefaultDomain_0&hash=item3f0d74f00e

But I only need the castor wheel, anyone know where I can find something like this?

Powering a Rover 5 with a Lipo?

After reading these forums the last months, finally my first post :)