Lyn,
I wanted to extend my corner tube out several inches to provide more flexibility in the connection, but it required more fabric. It looks to me like Exped is using valves similar to the new red valves now available on DIY, but with an additional smaller connecting link. The 7/8 OD silicone tubing works great, but I don’t think it’s such a firm attachment that one could lay on it?
Here’s a photo of my fitted silicone tubing, with a cork that inserts on the inside to close the bag, similar to Exped’s idea. I’m using a homemade copper tip on a soldering iron to finish sealing in the corner around the tubing. It is also glued and I added heavy duty thread to tie it off. The thread keeps the glue from peeling back around the tube under air pressure when inflating the raft.
