I fly the one I have, with a sheave/pulley attached to the
anchor post, and a
line leading to the cockpit, so I can adjust said tack
line as to ht, lower for more upwind, and higher for more direct down wind runs. Some will buy a Seldon gennikar spar, that will get the tack line a bit more forward of the bow. This is probably the best option, but a $600-1000 typical boat unit cost! I believe, do not quote me, but you can u a longer assymetric ie more sq ft with a pole vs mounted on the bow as I have done.
Some boats, it is also not recommended you used the
anchor attachment point for the tack line. If you have a weak one, or not well attached, do not use this point. I have pics of my setup at dock if that would help. None at this time sailing.
Marty