well, i did both sets of control arm bushings and the shimmy problem i have has gotten a lot worse.
I noticed the bushings did not fit correctly AFTER I drilled and pushed the old bushings out.... so I put the new powerflex in the lower arm and it had spare room on the outside of the bushing to the arm housing. anything over 40 mph and the whole truck starts shaking violently.

I just checked and they shipped me a set of PFF5-602 bushings, which are for the e34 and e32, but not listed for the X5. i'm guessing they are too flexable for the x5 for some reason.