I am building a Great Auk. I've read different accounts on making your own seat, as well as what's been posted on this message board as of late. I've really enjoyed the building process but feel I can do without trying to sculpt a seat (ie. I'm chickening out). Anybody out there got any recommendations on a "store-bought" seat and back rest for my Great Auk. I am currently using a Current Designs' Storm and find that unit's seat and back rest very comfortable. Thank you!