Here is my YRF I have been running it for a few months now and have some good results with it,
Some setup tips,
The build guide on PetitRC is good to follow and has lots of good tips,
Things I have changed from Factory,
ceramic balls in the diff and used 3 cone washers.
Replaced steering arms with Associated titanium arms and ball cups, allot less play then the Yokomo ones.
I have the updated Front suspension mount this will stop any breakages
I race on a very low grip track and found the steering kit helps with moving everything a little more to the rear and helps on high speed corners.
The Ackermann is also much improved.
For oils I have Associated 45wt in both main and side shock.
I am using the medium side springs, I found they help get the power down a little earlier.
The 3 Racing front wing has much more steering then the Yokomo one, I use these wings as a good tuning tool to dial steering in and out as needed.