Hi folks !

3 questions.

1.
There seems to be a wide consensus about Guy Cribbs' 1/3 rule, i.e, the rear harness line should be at 1/3 of the distance between the mast and the clew end of the boom.
I am not clear, however, about how this distance should be measured : is the distance from the mast along the curved length of the boom or is it the straight-line distance between the mast and the clew end of the boom, i.e. the width of the sail?

2.Also, I hear that for larger sails 7.5 sqmt and over, the position of the rear harness line should be 1/3 as defined above less 2 in. Is it true?

3. We often read that the harness lines position on the boom should be where we can effortlessly hold the boom with one hand and the rig feels almost weightless. i.e, the balance point.. THIS POINT DOES NOT GYBE WITH THE 1/3 rule. Actually, from my own measurement, the 1/3 point is considerably more backwards than the balance point. What is the score on this?

Thank you

Francone