Does anyone have a new or used harken 29 mm quad bullet block? We have a fleet of hobie miracle 20's and need one for the downhaul. If used, it must be with out any damage or it wont work properly.
Ditch the quad block and run an 8:1 double cascading system. You get the same amount of purchase as the stock setup but with less friction, so the DH moves more easily up and down.