I move back and forth between a single Comfab and my Triton "dually". I found the most important items to be GVW (check the axle rating and the tire rating), bunk adjustability and winch adjustability. I have carried a GTX RFI, a GTI LTD 155, GTX 155 and a Yammie VX in all combinations. The Comfab single that I have will not carry the new "S" machines as they are too heavy for the 750lb GVW. I have a 3500lb axle on my Triton, but it still has 12" tires which limits the load to 2500lb. 13" tires are next on my list.
I set my machines up so the back of the hull is even with the back of the bunks. Some guys do a little overhang, I do not. The pump and any decking left above the pump is enough overhang for me. It also makes it easier to deal with the tie downs. The bunks need to be adjusted in or out to get a complete fit with the hull. Make sure the bunks are not on one of the chines. The winch needs to be adjusted to accommodate the jet ski aligned to the back of the bunks and the nose roller tight against the bow. Strap goes under the roller and connects through the bow eye to prevent lifting or nose bounce when towing.
I went through my procedure, because I cannot tell any of those critical items from your photo.
Hope that helps.