Vibration at Idle in 1990 535i Auto and Other Issues; Please Help

[an535i]

Installed new pitman arm "connecting links" today, Meyle of coarse. Biggest improvement so far; that was definately a big part of the problem rear is much more balanced now and car gos through turns with less correcting ..
My question is: Do i need to do a 4 wheel alignment NOW because of removing those links and putting new ones in?
Or

Can I wait and put some new springs, and new struts / shocks and then do a 4 wheel alignment??


Thanks for the assistance ;
ps:
I sent my rotors out to get turned at a local parts store.. long story short : they began to cut one of the rotors and made it ALOT worse by doing so, now I have to get new ones.. I'm looking at 50$ a piece my supplier (O.E.M. Parts at a discount) vs. 30$ a piece at RacingKing.net .. Why are these so much cheaper and can anybody attest to their quality?
pss:
Do i have to put new pads on when i put new rotors on? Apparently the pads i have on there are harder than granite and after 20K miles still look the same hahah

[AllanS]

I don't think an alignment shop would do much, if anything, with the rear. There's not really anything to adjust, afaik. When I replaced my springs/struts/thrust arms, the alignment shop didn't even touch the rear, and didn't do much with the front either. I drove around for a couple days before the alignment (took a week to get an appointment!) and afterwards there wasn't a difference. A year earlier I took it to a different shop, which specifically does alignments, and they said the same thing, there's nothing to adjust in the rear.

I wouldn't get rotors turned btw- it's a waste. You can read some stuff about it here:

http://www.garageboy.com/bmw/brakefaq.html

Buy new pads too, just to make sure they get to know the rotors properly the first time