Andy,
Get in contact with Grant or James cooper for wheels and mounts. The blue wheels they have are used in a large number of featherweights in the UK.
The 5v output electronize has what is known as a BEC (battery eliminating circuit). This is able to supply your receiver with power from your main set of batteries without the need for a seperate smaller set battery pack. Receivers typically work in the range 4 to 6v.
Adrian,
I have had limited experience with those motors in another project. They look similar to the motors used in the zeobots kits so perhaps you should find someone that had one of those kits or get in contact with technobots. You have to be careful which motors you use as there are a large number of variations (voltage etc).




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