Way to go man! I made a brief reply to your post about corbins in the other section. In addition to more legroom and back support (with the optional backrest) the corbin seat is more firm and a tad taller. Read up on the links Bill provided you and you will be much more informed about the Corbin thing. I am not an ergonomic expert by any means, but, in my opinion a firmer seat is more comfortable over the long haul, but everyone's butt is different sooooo....
Welcome back. I am very happy to read that you made it w/o any problems...or were there?
Best regards,
Pete