Thanks to the generosity of a forum member, I have an Air Hawk that matches the dimensions of my "seat" and my motorcycle's seat.I use an air hawk. I have it set so that some of my centre weight is still on the seat, and it fills in the side spaces with air cushioning.
Straps are set really loose, so that the hawk moves around with me rather than the bike.
It was used to ride down to Alabama a couple of years ago.
Haven't been able to snag a used Corbin. They go really fast for my bike, and I've narrowly missed two of them.
I tried the smaller air hawk, which I think was the recommendation for my bike, but it didn't cover enough area and squirted forward and back as well as moving side to side. It's still kicking around somewhere.
This one's the smaller one, that I don't use:
Hope to be 'floating on air' for future rides!
(Most of my rides are 3 - 4 hours)
Will add feedback when the "Stay Home" order is lifted.
Muchas Gracias, kind donor of the Air Hawk!