Having had foot straps made up I am now wondering best height from deck to fix them.  I am learning that there may be different heights for various situations. So I’m asking for a cruising situation and “L” plate sailers.  Pic. attached showing a looped rope to deck and looped shock cord to hold straps up, is this correct? or will a single rope and shock cord do.  Also best way of attaching the rope to the eyelet as at the moment I’ve temporarily looped and then knotted above the eyelet.  Am I right that very little tension is applied to the shock cord so as when stepped on the strap depresses easily.  Thank You.