Hi John.
I was looking at that seat when I started my first ( & only... so far,) kayak
but I was concerned that when I cut it down to fit, ( like you did,) That
it would remove the stronger edge and weaken the seat to much to stay rigid.
However now that you tested it for us... I think I'll give it a go too.
Thanks... & if it breaks... It's not like I couldn't afford to replace it.
Wost case... I'll use it as a mold to do the glass seat thing.
Dave