Has anyone tried the Rev n nator ?

I am a very satisfied user of the rev-n-ator box. I bought one of the first units out. I waited to install it at the dragstrip. I ran with my FBO box and FBO coil during the drags untill eliminated, then I put on the Revenator to do test run. I set revlimit at 5000 and did test run. It ran ok but rev limit hit at 4000. I set it higher but still limit came in too low. To make long story short, called Troy the owner & he said to bypass the ballast resistor and run 12V to it. I did that and it worked great. Rev limits came in right on set point. The ET was right close to where the FBO box was running.
The Revnator may have saved my engine. I went to do burnout before a run and the engine hit the rev limit. The trans slipped in 2nd gear and allowed engine to rev higher than usual. Trans needs rebuild but engine is ok. It gave me confidence to raise my shift point and lower my ET as result.