Hey wait a minute, your work is fine and you can fix this issue!
Wow tough room here and I am surprised at the lack of out of the box thinking/advice offered to correct your problem. I am new here but I do have a lot of experience in getting ski-type hulls/runabouts/flat bottom/deep v-hulls to perform well. I have adapted many types of boats into "perfect" ski-wake machines and never once have I comprimised cruising performance/comfort. The thing is when you modify a hull to do something it does not normally do, all of the normal engineering dynamics are thrown off. Typical solutions will fail because you are now operating in unknown territory. That said I think your hull-mod is bad ***, took guts to attempt, and looks damn good for someone who has probably never modified the hull/extended the transom of an existing boat before. I think the paint drips near the chines attracted more criticism than it deserves. I am a believer of if you don't have anything of value to offer, you should just not offer anything at all and that goes for any snub-nosed comments about your work. I did not see any offer of help, or pictures of his mod looking any better so screw'em. It also hits me that you probably care a lot more about a perfect wake than you do about a perfect riding boat. This is something most people will not understand unless they are very passionate about being dragged behind a speeding boat. I totally get it and would cut my checkmate in half if I thought it would allow me to perform wonders when being dragged behind it. So, here are some suggestions that I have used to correct the porpoising problem after modifying a hull to make a better wake. First raise the motor (even a smidge) then/or try a dol-fin on the lower unit. yes I know it is not designed to eliminate porposing but it changes the ride of the boat and is sometimes enough to stabilize the ride. Second choice would be to change the angle of the mount itself with wedges (your desired deg. of angle change is TBD), more times than one I have solved this issue by adding a jack plate (maual or hydro). another thing to try would be to play around weight ballast and motor height/angle together. My favorite fix was always to try some further hull mods such as side-strips/under/strips (strakes?), stainless bolt-on rudders, or even scoops etc. I once had a porpoising problem on a hydroplane that was severely overpowered. I took some stainless vent plates from another boat and fastened them to the rear underside of each sponson. they acted as closed/dead end water scoops creating enough drag to change the dynamic of the ride and eliminating the porpoising problem. you might try some drag inducing attachments on the forward portion of each side of those "duckboards". Your idea of a stationary trimtab is right inline with the type of ingenuity needed to solve this while keeping your current mod. Trick is to keep trying and have fun while coming up with new modifications/solutions. We are not all trying to accomplish the same result in our boat building efforts and unconventional methods should never be frowned upon. Good luck.
