Hi Ken,
I am planning the same changes shortly as I have the same clucking noises from the rear control arm when riding over slightly uneven roads. I believe it does make a difference to the handling in extreme situations because the worn rubber bushing might be moving slightly causing the suspension to move under powered cornering.
We have lost the rear end twice now, once in the wet when the car snapped sideways and got me into a bit of a tank slapper and the second time it caught out my son driving on some dry cobbled streets in Paris.
I will update when I make the changes in the next few weeks.
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