I see nothing in Heinz's discussion of Mulfab 140 in/lb setup related to rebound springs. However I have removed My Suplex Kit and re-installed the Mulfab setup. I measured the gap and cut the rebound spring to fit the gap. There is no pressure at static. The rebound springs turn freely. I must say I prefer the Mulfab setup. But the difference in road handling is dramatic. The ride is more compliant with the Suplex kit installed and subjective. I think the Mulfab kit vs Suplex is apples vs oranges.