Harken adjustable genoa leads ride on Torlon ball car bodies, which adjust easily under full sheet loads. Rod cars require more effort to adjust, but are removable from tracks. Blocks feature wide sheaves and will accommodate two sheets during sail changes. Sheave carriers pivot to either side to accept changing lead angles. Mini-Maxi car s come with control blocks for a 2:1 purchase or puller tangs for a 1:1 system.