Running a Vega 4.1 since the start of 2012 indoors and out and it works great as standard. I have always used a brass front bulkhead, as usual RPM ballcups and recently switched to Durango big bore springs which made a big difference.
The only other thing I have just done is to change to the Avid carbon rear hub towers after constantly popping off rear outer ballcups at a national round run at an 8th scale track, as standard the rear camber links run at a pretty extreme angle and the carbon bits combined with some spacers under the inner ball studs help to straighten them out which should make it harder to pop them off. Never had the issue before I have to say so really the car has been bulletproof as standard.
