Check out my thread
http://rotarycarclub.com/rotary_foru...ead.php?t=6823
I did those bushings all with a ball joint tool and didnt need a press.
I hear the delrins can transfer some vibration and definitely cause more road noise, so I prefer the Superpros as they won't, but are still stiffer and more durable than stock. The Mazdaspeed bushings are nice too, but they are pricier than the Superpros.
I've done a full set of bushings also, and they can be done with the ball joint tool also, or with a press.