+1 to everything MA said above, plus:
- Have a look at my effort at this -
www.seabreeze.com.au/forums/Windsurfing/General/Added-a-mast-track-to-a-SUP/- Since you are in the WA forum, I am happy to meet you at Melville on a suitable day to for you to try on my board, and to give you whatever advice you want on your board