I'm looking at Scott Easons helpful list of line sizes but am still confused. My boat has old Lewmar rope clutches which require 3/8" line to hold. I tried an extra halyard 3/8" tapered to 5/16th. Its too large to pass through the sheave at the top which is small and has a guard. Im assuming the answer is to use a thinner taperd line and replace the rope clutch. What are others using? The tuning guide says 3/16th technora but doesnt say the cover size