Hobie 20. got spin, got blocks,got pole, got halyard.....need good tramp bag and main sheet. How much sheet should I purchase and who has the bag?

Hi

think 66 ft is what the I-20 uses
the N-6/0 with its aft block location takes more ,

Not sure where the H 20 LEAD spin blocks are -but
adjust accordingly -

On the bag ,-a number of good sail lofts have em ,
try one in your area or spin maker -

also some like to rig up a two to one purchase for long distance races which takes more line also -

hope that helps
Carl