Donunder
Love it and must Patent it. The Gurney Bubble is for the big guy to fit his head in..
Mine is the Bernie Bubble to fit your fat arse in..
But seriously, it dropped me down about 15 - 20mm and allowed the rubber trampoline seat base to drop into it and keep off the floor - bottoming out..
So the seat stays in sprung soft mode.. And allows me more comfort.
Jamo the "Moderator extraordinaire"... called it the Bernie Bubble....
Bernie