Hi Fisho
Tabs and twins are great on my real Seafarer Vagabond for a number of reasons.
Apart from leveling the boat if you use Lencos or Bennetts you also get the benefit of extra bum lift, or I did anyhow, even when they are fully up.
The 9 by 9 Lencos also complement the foils that are fitted to both my motors. With the motors and batteries etc in the tail end the tabs and foils mean that at slow plane in windy chop there is a lot less spray blowing around probably because the bum does sit a couple of inches higher than it used to with out the additions.
Cheers
Chimo