An alternative to super-slooping could be to roller-furl the spinnaker instead, same idea as the hooter but using a spinnaker that is class-legal in dimensions & shape.
Super-slooping in over 15 knots could prove interesting for all but those who weigh in at the top of the scale, whereas the spinnaker makes downwind easier & safer, even solo in moderate breeze. At our solo champs the guys pitchpoling downwind were those who DIDN`T hoist the kite, the spinnaker really lifts the bows & makes the boat feel more stable - just don`t try to reach too high (like I did) or swimming lessons will be the result!
The only drawback of solo-ing with a spinnaker is hoisting & retrieving, which is where the roller-furler might help.

Cheers
Steve