I'm still experimenting. So far, with my small foredeck, I suspend the front section with tow ring from spinnaker
topping just high enough to slip stern section under (so vertical against the mast). Assemble. then wrestle the thing over the side.
Admittedly, this is awkward at best, and I've only done it once as a "test" while at the dock
in a dead calm. Still managed to ding the paint
My next test will be to experiment
with two halves over the side and assemble while sitting in the stern.
But I don't have enough experience with it yet to give a definitive answer. I'll keep you posted when I figure it out.
Also open to other ideas?