Hi Thermonty73
Most people use the tamiya twin motor gearbox for the drive, although the plastic gears can be a bit fragile and the motors really need changing to 12v scalextric type motors, i got one off ebay for about £10 delivered for another project, then you just need a couple of micro servos for the blade, ebay is a good place to start..........hope this helps,oh and theres a build thread here
http://www.rc-trucking.com/viewtopic.php?f=29&t=1225