Another suggestion:



With the rear crossbar traveller on the H16, you really don't need a boom vang.

A starting point (or rule of thumb) for downwind sailing is to run the traveller all the way out, let out about 3 feet of sheet between the blocks (up to about 10 kts. wind speed) and jibe downwind through 90 degrees. Above 10 kts. you can sheet harder and/or sail deeper and the "groove" will be much easier to find. Other sailors will have slight variations on traveller placement and sheet tension. Talk to them and experiment to find what works best for you.