Powerflex bush upgrade

[blueblood1995]

Hi

Has anyone had the Powerflex bush upgrade on their 159?

If yes did you have the upper and lower arms swapped out?
I was advised that the 159 only benefited from a lower rear arm change due to great difficulty in setting up the camber & caster alignment when changing the top front and top rear.

Any feedback would be greatly appreciated.   

Cheers
BB