Roger's item transformed my last 4/4 which was not suffering from spring sag. They are a brilliant addition. Clearly the gomog comments reflect the opinion of someone who hasn't tried them. Nick
This is exactly my experience too. My springs (4-leaf supplied by Peter Mulberry) are absolutely fine, they haven't sagged at all since they were fitted. The bump stops do exactly what they are intended to do (which is not to compensate for knackered springs) and I'm delighted with them.
Tim H. 1986 4/4 VVTi Sport, 2002 LR Defender, 2022 Mini Cooper SE