I'm heading to France in a few days and will get to try this concept out.
I have a Slash and can't fault it.
Being able to swap fins for Foil adds a whole new versatility.
The idea is to have a system that doubles as a surfboard with fins, then switch it to a foil board for course racing or very light wind.
Some use the front strap only to aid in rough water starts but take foot out when under way.