I am not trying to hijack this thread but trying to get some answers to an observation made in OP.
If someone can enlighten me please, where is this dreaded "floaty" ride come from. People are swapping firmer spirings in place of OEM, but still floaty. Is it the design, stiffness or the stock dampers? Surely there are suspension gurus who can contribute as to why. Thank you in advance.
2007 E92 6MT - Silverstone II with /// Performance Exhaust with ACM Test Pipes and BPM Sport Stage II Dev-Tune - Proper engine warm up, 12-monthly oil change, Castrol TWS 10w-60
2014 F15 X5 3.0d