There’s a Russian packraft boutique who uses this valve hack on their packrafts:https://www.birdypackraft.com/. There’s actually a lot of packrafting going on in Russia, if you know how to use Google translate or Deepl. Personally, I don’t like the Boston valve much. Its too bulky and too protruding. I would go for a bottle cap opening for bag inflating and deflating plus a topping up valve if I ever build a new raft.