Get the "Suspenz big EZ kayak Rack", it fit my Hobie Outback ,14' and 3' wide. easy to put in and out. Cost about $25 more.
I don't know what a Jackson Cruise 12 is, but it I can tell you that it holds my 13Ft, 70lbs, three-person fishing kayak. It is an excellent rack!
Regular holds my 36" wide FeelFree Lure 11.5' just fine
front to back. I pre drilled a hole to put the screw threw. the side holes i think are for condensation release . I had to put tape over them as mine are on the side of my shed over hang outdoors and bees were trying to make a home in them also use a Harmony Gear Cockpit Cover to keep stuff out of cockpit