There's an easy trick to installing Powerflex bushings, use a 1/2 x 6 bolt and washers to PULL the bushing into/thru the control arm with the metal sleeve installed in the bushing (bolt/sleeve aligns the bushing). Pressing them in is difficult.

The pic above shows the hard part, getting the old ones out.

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'03 X5 4.4 Sport, last of the M62s (8-03 build date)
I believe in deadication to craftmanship in a world of mediocrity!