In the case of in-mast furling systems, the complaint is that without a full-roach mainsail a multihull's performance is hopelessly compromised. In the case of in-boom furling, the concern becomes chafe and the reliability of a type of system that has long had a reputation for being fickle. Selden Mainsail furler servicing The Hylas Yacht Owners Association site, originally launched in 2007, is the un-official website for Hylas yacht owners. The primary objective of the site is to bring together the community spirit of Hylas owners regardless of boat's condition, model, or boat age. (A10) Manual external mainsail furler "RGEM" This system is the forerunner of all vertical furling systems on the market. It has started the fashion of vertical external mainsail furlers. It is characterized by the famous "worm screw" coil drive that grants a correct stowage of the furling line avoiding all possible overlaps while furling. Overview of Mainsail Reefing Systems. The Mainsail Reefing System from CDI offers a reasonably priced system that can be owner installed. The design is based on the time-proven CDI Flexible Furler. The Mainsail Reefing System eliminates flogging sails in the cockpit when reefing or furling. Manual for Furling mast TYPE RB Mk II/RC Mk II 595-063-E 2004-12-08. 2 PRODUCT DESCRIPTION. Selden Mast in-mast furling mast is a mainsail reefing and furling system. The furling geer been developed from experience gained from FURLEX foresail roller-reefing, Furling Mainsail Outhaul Systems. Use furling outhaul cars with in-mast or behind-the-mast furlers on boats up to 13.5 m (45'). Sheave carriers pivot side-to-side to accommodate changing lead angles. Systems have 2:1 purchase and ride on cars with Torlon® ball bearings. A dead-end outhaul shackle is included. Cars have axle-bearing sheaves. The installation manual on the Harken website has a complete step-by-step guide. What happens if the electric furling system loses power? Harken electric furler