Ooooooooh, oh boy, not an unsurmountable one, but regardless,
something you really, REALLY need to be aware of and follow-up on! And possibly you've created a potentially dangerous situation that should be corrected. But by mounting the new tabs both further outboard
and past the reverse chine on the running hull, 2 things ...
1) When you deploy 1 tab, it will steer the boat towards that side, i.e, to lower the
port bow, the system deploys the
starboard tab, thus the boat will pull/steer to the
starboard a bit.
FYI, mine does that too, but mine are still a good 2-3 inches closer in-board than yours are (mine just pass the reverse chine feature by an inch), as I upgraded to even larger tabs (24" chord or span). To prove to you tabs can steer a boat, just for kicks at planing speeds, I once brought it in from offshore without ever touching the steering wheel ... just by adding or subtracting trim tabs ... and playing with engine speed when I need to pass someone or allow them to safely pass ahead of me
.
2) You
MUST raise trim tabs fully in a following sea condition or you could have severe handling issue and could induce a pitchpole if a huge wave hits you on that side of the boat.
This could be a dangerous situation ...for anyone ... yours, even worse!
Tabs should be ideally positioned 3-4" from (inboard) of the chine, where the topsides meets the running hull. Ideally, also should be inboard of any reverse chine feature. You are not only well past the reverse chine, you are almost, if not directly positioned right ON the chine juncture.
It is my firm belief that you should move them ... and if it were my boat ... I sure would. I would also contact the tab mfg'r and show them what you did and get their feedback.
In nasty inlets, that positioning could lead to loss of control of the boat. I would also strongly advise that no one else mounts them that far out, that's for sure! Sorry to be the bearer of such news ... but if something bad ever happended that I could have helped prevent, well ... let's just not go there.
