I installed an Altronics O2 Alert over the winter. We went out yesterday and only got one run due to a huge car count and complete disorganization by Famoso Raceway. The altronics is awsome. It shows that Patrick at Pro Systems is right on with the carb setup. I made a screenshot if someone can tell me how to post it I will. It is great, it shows the 2-step and then when I let go of the Trans brake you can see it spun for about 1.3 seconds, then hooked and pulled the motor down and then accellerate down the track. It also shows that I am late shifting on my 7000 shift light. Great tool!!!