Thanks Stringy,
I'm just back on the forum and found your informative reply.
I like the "wings" on the Sea to Summit and the price is more appealing so...... Thinking that way.
It looks Like you mounted the stock Hobie seat on top of the Sea to Summit seat. I didn't get the impression that you were doing that in your early post.
Also ....the Hobie Air Cushion. So That's how you use it!.... I've been mounting mine underneath the seat.
Thanks for the information Stringy. This forum sure is great!
Fair Winds and Dry Bums
Don