Take the flog out of handling your mainsail with a Hood fully battened ... Hood’s Fully-Battened Mainsail dispenses with the need for that extra pair of ...

Advantages of a Full Length Battened Mainsail over a conventional Short Battened Mainsail 1. The battens aid in keeping the design shape throughout all wind ...
www.owensails.com/os/fully.batt.main.htm

The main rig options center around the manner in which the mainsail is attached to the mast and as a result the type of mast tube used. The three main types of attachment methods are:a.lugs on the luff of the main or a bolt rope which slides in the groove of a Bantock groovy mast;b.a jackstay attached to the round mast section in the manner made popular by Graham Bantock (no one seems to use the traditional jackstay on IOMs these days); orc.luff rings to attach the sail to a round mast section in the manner used for many years.
http://www.tsdesigns.com.au/ts3InstructionManual_1_0.pdf.