having good 4wd experiance id say, for your first bot, make a nice rectangular base, then get 4 drills from argos (£10 each or so) and mount themto your base. get some blue wheels from james or grant cooper and they just screw onto the drill shaft, then wire the two left motors up to each other, you should have two wires left over, do the same to the other side, buy a speed controller, id recomend tom wilkinsons speed controllers as they are very good and quite cheap, he isnt a big brand though so if he dosent have what you want the electronize speedos ( a different word for speedo is esc btw) ut you wil need 2, wire the wires from the drills into their respective esc/s (one es for each drill if its electronize, one esc for both if its a dual esc) and then plug the other wires coming from te esc into the reiciever. there should be a battery slot coming from the esc, plug your battery into there, well thats my area of knowledge :P ask around for other tips, we dont bite....mostly :P