Still, If the most right LED is green for full tank, going down to yellow and red, parallel is an option. I was aware of PC lapcounter, the only reason I haven't tried is that It doesn't have auto track call, something I think I can't miss. I admit that PCLC's pit pro functions are what I am looking for. It uses 1 led for fuel level, which startrts blinking faster when getting empty I believe, but I especially like the stop&go feature. After taking a look again at PCLC, I think I can initiate a track call with a button connected to the parallel port. Interesting, since I use button brake, I need an extra button for track call. So, parallel the led's won't hurt I guess ?