Remember to 'fade' the front to rear speaker setting to +1 to the rear.
first thing I did was have a play with the sound
and ended up with +1 to the rear
as you all know I opted for the powerflex bushes but the instructions and tech support from powerflex were useless. I had one of my mated fit the bushes (who is a bike mechanic) and it took him the best part of 3/4 days to fit them and even his boss said they were a pain to fit.
they tried pushing them in using a bench vice which was difficult as they both were afraid that they might damage the bush and split it or worse, push the metal rod out. they tries warming the bushes hoping that it would make them softer and easier to push in, that didn't help much. in the end they machined the smaller lip down enough to make it easier to start pressing the bush in. my mates thinking was that its still got a lip on the inside of the beam and once its fitted it wont be going any where, and having driven it, the back end doesn't feel loose like when we had a garage incorrectly replace 1 rear trailing arm bush on Focus number 1.
its not something that id want to do again but I have no regrets fitting the new bushes as I know that area will pass the MOT.