You're going to have to drill into your hull to mount the tabs, so why not a couple more holes for the actuator? It would save a ton of time and effort.

It looks great, a lot like the Mastercraft tabs. That outward angle should probably make for a great wave, since you're getting a little tab effect, and a little gate effect.

As I mentioned in my write up, I'd recommend tapping the hinge holes and use machine screws, not sheetmetal screws, unless you have access that you can through-bolt.