The unhooked backroll is a great progression trick when first starting to unhook. Once you have hooked in backroll sorted, and have started throwing your first unhooked raleys you're ready to try unhooked backrolls.
For the backroll, it's you need to tack off with good pop and throw your head over your back shoulder. You need enough air to make sure you get the full 360 degree rotation.
A common mistake is leaning too far back which results in a horozontal spoin that is swiftly followed by a buttcheck. Prevent this by getting your legs as high as possible during the rotation.
As you come round the last part of the rotation spot your landing, then bend your knees for the landing and ride away smooth.
Go downwind and unhook, keeping hands as central as possible with the kite at 45
Edge progressively hard upwind and release your edge whilst pointing high
Look over your front shoulder and push off the water with your back foot. Keep your elbows bent to ensure you transfer the power into the rotation rather than the pop
Tuck your knees in to speed up the rotation and extend your legs to slow it down. The higher your pop is, the slower you can make the rotation
Spot your landing as your come around, keeping the kite as steady as possible. Use the bar to aid your balance. You can salvage a bad landing by using the bar to keep you in position.
Land with your board going downwind
Hook back in and ride away!