You can get the hand-held Tenma, probe and line all for about $110. Just so happens I found a Fluke model #52 with dual inputs, max/min recall record but no backlighting. That's ok, most of my racing will be done on Saturday anways because the rice has the place overrun on Friday night. You can purchase the long length of wire, clamp for the header and probe from SMC for $30 or hit up Omega on-line and put your own together. The only real part needed is the long feed to get it inside the car.