You don't need the Ocean Rodeo stuff.. that's just blatant promotion of a product.
But seriously, DO NOT GET A BOARD LEASH.
It is the worst thing you can do. Surfers can do it, but when you kite, between the board, you and the kite, it can and will act as a pendulum and
it's extremely unsafe.
Learn to swim, learn to go upwind in the water and you'll never need a board leash.
Pansh Ace 2m
HQ Beamer TSR 3.6m
RIP: Pansh Ace 5m, Blade III 10.5m, Phantom 12m, Naish Torch 10m, 12m, North Rebel 14m