Denis, what you describe is what I have, a tack line to a clete on the beam, which gets pulled first when hoisting, and last when snuffing. The good part is, when you douse, you just dump the halyard and pull the retrieve line as fast as you can, you don't have to worry about the tack going under the bow, because it is still fixed at the end of the pole, until you unclete that one and finish the snuff.

Yes, it takes a half second longer to reach and unclete the tack line and then finish the snuff, (one more good pull) but I never have to worry about the halyard/tack line getting all twisted up and ruining the snuff. I had a set up like you have drawn on my Nacra 5.5 a long time ago and the 2-1 tack line was always getting twisted, which added a lot of friction to the hoist.