Hey Marvin,
I just finished my 12R5 and will be taking it to VRP this Thursday night to put some laps on it. If you can, try and come down.
I'm going to start with mine geared 42/75 and see what happens. It's a Tekin RS Pro, Fantom 13.5, Fantom 5000 40c LiPo combo. Tires are 44.5mm rear and 43mm front for now. It's been a long time since I've run a 1/12th scale car. Can't wait to get this on the rug!!
Curtis