There is just one issue with the snap davits, I found this out when we gave away the stern mounted davits, (a fellow marina occupant knocked one off in a botched docking), and that is if being added to an older inflatable, there can be issues getting the glued on dinghy parts to stay glued on. It was not helped by the fact my particular dinghy tends to go slowly down in pressure because of dodgy mushroom type valves, so the Zodiac might well be ok. I've certainly seen plenty of them successfully using the Weaver snap davits. But be sure to get the shop to put them on the dinghy for you, so you have some comeback there. The swimstep parts are easily fitted, and you really need them on the dinghy first so you put the other parts in the corrrect position. Try to do the mount so the bow of the dinghy is as far away as possible from whichever side the transom door is, but without the butt (stern) sticking out beyond the boat's side of course, so you can still step in and out without too much trouble.