First, please remember that a ride plate is very different than a trim tab. All a tab can do is add drag, a ride plate acts as an extension of the running surface and can provide hook or rocker depending on how it is set up.
Our Sanger V215 has a similar plate and I have looked at ways to make it adjustable. Good old fashioned V-Drive cavitation hardware using an electric actuator would be the best. It would be a custom system, probably requiring the engine to be pulled... expensive.
Arneson makes a bolt on rocker plate:
http://www.arneson-industries.com/pa...ucts&id=rocker
The right one of these would be cool but also over kill.
With the Arneson system as inspiration I am going to have a set of mounts and rocker arms machined up that mount a pair of Lenco electric actuators next to the adjustable support arms.
Will try and describe it...
Transom End:
Actuator and adjustable link.
Plate End
Rocker arm: Three holes, (actuator, ride plate, adjustable arm) Designed to use the full stroke of the actuator (2.25") to move the plate 3/8-1/2" total. A note here this is all the range I believe the V215 needs, your hull may be different. The description is making it sound complex but it is simply a class 1 lever with the plate pivot as the fulcrum...
I hope to rough the system out next month.