Moving the mast foot forward, to enable resting the boom on the tail of the board for your waterstarts, causes some real performance problems with your boards.
Perhaps not on your Tiga with a very "old style" rockerline, and perhaps even on your Realwind (as one of Rob's real goals with the Realwind boards was to use more traditional rockerlines).
But on a modern board, with an "up to date" rockerline, putting the mast foot all the way forward definitely will cause some performance issues.
Have you ever tried your boards with the mast foot well back in the track to determine the difference in performance?
Moving the mast foot back should free up your board, give you much better speed and and far more comfortable ride over the chop.
Hope this helps,