Time slips dont lie .Remember my 60 foots went from 1.65 - 1.68 on a well preped track to 1.54 - 1.59 on a well preped track or gravel road with no other changes other than installing the slapper bars.I would say there is sum gain there ...
Just a band-aid on worn out set of springs. A good set of springs and they would not help a thing.
