Any pics of your modifications you can post would be most helpful. I have a 14 Turbo that had a tendency to pitch pole but with my rake adjusted further back I now have no problem with the leeward bow diving anymore.(not nearly as much) I sail in the Atlantic and Charleston Harbor mostly so I have the occasional large swell to contend with but surprisingly she rides the rough seas very well. I've seen some pictures on the whirlwind sails site of a couple of 14's with "hooter" sails attached to a long bowsprit. You might want to check with Chip Buck at whirlwind for some advice.
Take care and have a Hobie day! http://www.whirlwindsails.com/photos.htm