I've tried to use the various "formula's" out there to predict how my truck will handle with "lighter" here or "heavier" there...in my experience, your truck and driving style are sufficiently different from that of the advice giver that you really have to see for yourself. In my E-CRT, light center oil made the truck very unresponsive. I felt like it allowed too much power to go to wheels which were slipping. The result was a strange acceleration curve and poor steering. When I thickened up to 50K in the center it made a huge difference. Much snappier performance and better, more responsive steering to boot. Not sure I can explain it but I won't go lighter in the Electric CRT. Oddly enough I went from 30K to 10K in my Nitro CRT and prefer the 10K! Same tracks, different power delivery.

DM