We use Velcro industrial grade "loop side", with the self adhesive back, at both the front and rear of our Mystere Twister F18 boards. It works well, but eventually the glue gives up, sometimes leaving a gummy mess on the board. A little acetone cleans that up, and a new piece is easily applied.
A friend suggested using the regular/plain backed velcro, and some gel-type Krazy Glue. I will likely give that a try. The velcro is a nice thickness for our board/trunk fit.
Keep at least one hull in the air !!!
Alan Maguire