Finally finished the latch last week and got to test it "on the water". It worked fine and I think I'm going to really prefer it to the actuator. One of the best things about it is I can stand on the trailer fender and pop the hatch. We used that compartment for storage this trip where in the past I didn't put anything that required frequent access there because it was too much trouble to raise and lower.
I never found the latch catch that I had bought from MasterCraft so I made another one out of a flat piece of aluminum. I had to drill and tap the ski pylon crossmember to fasted it.