Beserco - From testing over the years I don't believe that softer (more flexi) suspension arms are good. In temperature changes their flex is effected more than just a very stiff/ridgid arm which makes it impossible to tune the car. Softer arms may give you a feeling that the car is easier to drive (it numbs the responce from the track) but never have I found it to be faster. Now, I know I don't quite race on the low grip tracks like in Europe but I look at two of the best rubber TC's out there (Tamiya and HB) and their suspension arms are quite stiff so while some will use this for tuning, I think it only hurts the performance/consistancy of the car especially in changing track/weather conditions.