My best advice to you would to get in to the habit of NOT using the tail of the board to recover the rig. It is definitely an effective method and it was how I learned to waterstart.
However you are compromising your sailing by limiting yourself to a board you may not get on with as well as a shorter one and certainly ruling out the possibility of using very small boards in much more challenging condiditons. Also from experience you will start to wear the paint on the tail of your board.
I teach windsurfing almost every day of my life and I can assure you that it's just as easy to not use the back of the board and I prove this to my students on a regular basis. If you would like some tips on this technique then just let me know and I'll be more than happy to help you out.
Don't limit your sailing opportunities!!