Rachi does have a Roho quadtro select
Me too. Sent kindly by the UK distributor for free to try. I dont use it because. Transfering via a board with no hard edges is very hard to do. And because air compresses and its hard to know I am not bouncing my bones off the seat pan when driving off a curb or if pressure drops. So I fear using it. And I also worry about deflation as I am often covvered in metal swarf, scalpels for cutting, drills, sharp bits of metal, hot solder that falls... Otherwise its probably the best option. But it lacks stability. I need the hard edges, hard front of the jay2, jay3, jay fusion or whatever its called in various countries.
As for comfort? Depends what you mean. Sitting still its got no hard edges, so is probably the least "painful" ?? And best for sweat on hot long days. But offers the least support. So you are not ideally positioned sitting on a bunch of balloons. You move about! Which means less sheer but more banging about between arms or moving forwards.