I went for the powerflex ones, and I had no problems fitting them apart from getting the old bushes out. I did leave the axle in at first, but the angle of the hacksaw and the tight working conditions convinced me to remove the axle, didn't need to disturb the brake system at all, just manoeuvred the axle out. Copper grease and bushes went in no problems. What can I say the result is? Well rear end feels a lot firmer but still somewhat loose, but I've put it down to hottuning coilovers and the rear suspension mounts being pretty destroyed. Id deffo buy powerflex again though, comfort wise I didn't really notice anything.