And then some, is constructed from parts I got from two disabled Power Wheels Jeeps. The control system is based on a Direct Logic Dl05 plc and a 4 channel Futaba fm radio. ATS has the abillity to record and replay the radio commands given it. So you can develop driving patterns and watch as the robot seems to act on it's own. It has four independantly driven gear motors (pictures shown as two wheel drive) and uses tank style steering. Speed control was cost prohibitive so I simply mounted limit switchs to radio controled servor motors to give the plc the directional inputs. Functions: Radio Remote Control Run pattern play back Heavy pay load capability (75 lbs appox) Parts: CPU- Direct Logic DL05 PLC Two 6 vdc gel cell batteries Two Futaba 3003 servo motors Four SPDT limit switches Drive gear motors from two Power Wheels Jeeps. Four Additional heavy current rated output relays Problems: Output current to motors was more than the DL05 built in relays could handle, had to add additional output relays. ON or Off tank style steering (no speed control) is jerky and a little hard to control at first, but it did get us up and running very cheaply. Cost: Have $55 into used PW cars and around $10 into the limit switches. The rest of the stuff I scrapped out from old control panels. just getting started on a web site but you cantake a look at Web site: http://www.torchlake.com/robots Email: ROBOTS@TORCHLAKE.COM