Most people have way too much sheet. You should be able to have trav at end of track and push boom out until its about 20cm from sidestay, at this point you should have less than 1m of sheet left over.
You also save a lot of traveller sheet if your trav cleat is on the car and not fixed to the beam.
Thanks. I have been wondering if i have to much sheet for a while now, but been to scared to cut anything, I'll test it out next time the boat is rigged. just cut 2 metres of the spinnaker halyard which has cleaned up the trap a lot too.