I've had my 818 on the road for a few years. It was built per the manual originally and every year I upgrade something during the winter. I am wondering if it makes sense to upgrade the rear lower control arms and if so what should I go with. The donor had ~155k miles and I am guessing the rubber bushings are fairly shot. Is a firmer rubber bushing and adjustable arm a good choice or would a bearing type connection be better? The car is mostly used for driving on country roads, haven't had it on a track. Some additional ride harshness is ok, but don't want it to get too crazy. Any thoughts are welcome!