@Spelt - I have a lot of respect for the other companies out there, Unshoes, Luna, Bedrock. They have all done a great job of bringing sandals to market that didn't exist. And I was ready to pull the trigger on buying a pair but wasn't quite satisfied.
My dilemma was that none of their products met my (specific) needs. Unshoes Pah Tempe didn't incorporate the thong but the really large straps are too large for my taste. Also, the footbed is flat which I could not get to work well in my initial prototypes...even when I walked the front ball of my foot wanted to slide inward, off of the sandal, as well as the heel...and this was only walking, not hiking, running, watersporting. Looking at Bedrock, again another great sandal company, but I assumed I would have the same issue. Then, when I molded my sandal, it changed everything. Instantly I felt like my foot would stay put which was a huge bonus for me. After putting on some jeans for a dinner with my family, I didn't like the way the single strap looked. Too much foot and not enough strap. And not enough support for my taste (I am that guy who will wear these things for everything except my day job).So I started fresh on the webbing design you see today which made me one happy outdoorsmen.
More testing and updates to come. Thanks.