Alan,
Which one are you building? As said, I believe that this makes a difference with this boat.
Remember that by moving the fin you are changing not only the cg, but the CLR as well, so to get a well balanced boat the CE should be adjusted as well......
CLR=centre of lateral resistance #### CE=centre of effort.
My advice would be to build it as per plan where all the math has been done for you, and if you don't like it, then making a second hull shouldn't take too long, or the first could even be 'adjusted'
For the bulb, yes two degrees up angle is a good plan, it makes for better downwind speed.
Good luck with the build,
Edward