, I have, but unfortunately, it was a guy that made it at home and only ran it for a short while. Obviously worked great, and HPI said that they would think about making it for their cars (yeah right
) when they saw it in a picture. Never seen much like it since.
Wolfpack radicals make (made) a pivotball conversion for the supernitro, but nothing else was available to increase the toe-in for the RS4 1/10 scale series... too bad, many guys would have bought it... and my point is a homemade project is all you can do.
40 and 45 weight oil should be good, but I used 50 and 45 usually, but I was using sorex 36R's on a pretty good surface.
Personally, I preffered 1 degree of toe-out on the front end, because unlike many believe, it made my car more stable in a straight line as well as coming out of a corner ( where the RS4 nitros suck most). It didn't track straight as an arrow down the straight away, but it was more stable and not as twitchy elsewhere on the track.
My experience... take what you want, but my main point is that toe-in on the front end isn't the best thing for this car.