OK getting back to the original question, as my NACRA does not have a boom it seems the preferred method is to use a continuous sheet for the traveller and main looped through a plastic ring in the centre of the tramp. Under this, I install a grommet and use shock cord from one of the beams to hold the plastic ring in place.

Currently I always go out on the trap with both the separate mains and traveller lines. With the continuous loop, the approach is to:

-going toward the weather I position the traveller at the centre and only take the mainsheet out with me on the trap, traveller goes forward to the plastic ring?

-reaching, I grab both sheet and traveller and manipulate both with one hand while under shock cord tension in order to control the boat - how?

-travelling downwind and jibing, position traveller at the inside of the lee hull keeping only the mainsheet in my hand?