Snuggest fitting ball cup/ball joint combo?
What do you rate as the tightest fitting ball end and ball cup combo?
I'm looking for something to be used as the ackerman link in my Yokomo - currently the left wheel has much more play than the right, due to there being two links in the equation - and I beliveve this makes the off-power tracking different to the on-power tracking.
Yokomo's standard balls are ok, but they're thin and stretch.
I'm running RPM cups now, which are sturdier, but still not totally snug.
Yokomo and associated balls are the same diameter according to the vernier.
I've used Fastrax cups in the past, which are quite snug, but stretch, and are prone to popping off when you adjust the turnbuckle.
Any other suggestions - perhaps Schumacher parts?
Or any other trick to tighten the fit? Grease in the cup? O-ring around the ball joint before the cup goes on?