It's interesting to see that the 205 in Seabob's post has trim tabs. My 1998 205 has the same Eurotransom, but it is equipped with a swing down swim ladder which would get in the way of trim tabs. I have wondered if adding a swim platform and trim tabs would improve the ride. I suspect it would in certain conditions.
First, you are not the first member to broach this 205 hull subject.
http://classicaquasport.com/smf/index.php?topic=9642.0Second, note that "Seabob" and "Capt Bob" are two different members. No big deal but one is tall and knows a lot about Genmar era hulls having worked at the plant and the other is just another pretty face. Still SB is no longer associated with this Forum while CB still hangs around.
Trim tabs seem to work well under most applications. I would guess they would help your hull. A quick review of the 2000 model year catalog for the 205 list both trim tabs and dive ladder as options and the swing down ladder as standard. You'll note that in the linked thread above, CLM mentions he has both so...
I know Bennett makes reduced sized actuators to accompany both tabs and ladders/platforms and ol' SB made mention of the Lenco models so I'd bet you could wind up with something that will work.
Good luck.