Nauticus Smart Tabs SX 9.5 x 10 w/60lb Actuator - White by Nauticus

What is the best 3M adhesive / sealant for these plastic trim tabs on gelcoat? 3M 5200 seems too strong, I'm thinking 4200...

Do these help with weight balancing like a traditional trim tab?

With these on, will I still be able to trim up some and raise the bow if need be? In rough or following seas.

I have a carolina skiff j16 with a 25 hp mercury 2 stroke. which one do i need?