If you've got a singular backroll down you'll be more than qualified to go for a double. Its a super easy step up that basically just involves using the kite to give you the hangtime to get all the way around for the second spin. We recommend learning this with moderate power, but it is the kind of trick that you can still do when it's too windy to unhook. It's a super fun hooked in trick that feels great so get out there and give it a shot.
Ride in with average speed with the kite at 11 or 1. You need enough wind to do small jumps- pretty much nothing! Have you hands centered on the bar with your index finger nice and close to the center lines.
Carve upwind to create some tension in the lines. You need pace to do this, otherwise you'll just sink
Look over your front shoulder and kick off the water with your back foot, just as you would if you were going for a singular backroll
As you are leaving the water, sheet in and let the kite give you some extra height
Keep looking over your shoulder and you will naturally do 2 rotations. To speed them up, tuck your knees up. To slow down, extend your legs out. The tricky bit is keeping the kite nice and steady. Try to not let it reach 12
As you are completeing the second rotation, you'll want to be spotting your landing and redirecting the kite into the power zone so that you can easily land and ride off with adequate power
Land heading downwind, fist-pump. Make a remark about how once is never enough.