posted 02-04-2003 02:32 PM ET (US)
ddg-I installed 12x12E Lenco tabs on my notch-transom OR22 a couple of years ago, and have been very happy with them.
As you have apparently found, the transom on your 22 is not solid (fiberglass and plywood) except in the mid-area where it is noticably thicker. BW recommends reinforcing the transom both where the tabs mount near the bottom of the transom, and where the actuator brackets come back to the transom up higher, if those locations are in un-reinforced areas. I did not do any reinforcing at the tab hinge-plates at the bottom of the transom, thinking it unnecessary. I have had no problem at all and really don't expect to, as the forces there are really more shear than anything else. I did use extra 3M 4200 between the hinge plate and the transom to augment the screws, and one could drill the hinge plate for additional screws if desired.
When I located the tabs where I wanted them (right up next to the outboard strakes) the actuator bracket came back to the transom half on and half off the thickened part of the transom. I fabricated a teak pad to go under the unsupported 1/2 of each actuator bracket that was about 1/2" larger than the bracket and gave a surface area that matched the plane surface of the thicker transom area. That was a little tricky because the plane surface of the reinforced transom area is not exactly parrallel with the plane surface of the non-reinforced area, so the teak piece had to be sort of a wedge.
I went beyond that and dug out foam in an area quite a bit larger than the actuator pad and filled the void with epoxy. My tribulations in that regard are recorded in a thread on trim tabs from way back in the repairs/mods forum, and I really don't think you'd have to go that far. I have talked to a lot of OR22 and Revenge 22 owners who have installed tabs and had no problem with no additional reinforcement at all.
Additionally, if you had someone to help you move a tab with the actuator and bracket installed around a little bit before you drilled any holes, you might be able to set the assembly so that the bracket was either completely on or completely off the reinforced area.
I have some photos of the finished product if they'd be of any help to you.
kingfish