the blue case is made by one company and used by many… and it seems the PCB inside is made by a few different companies with different tuning caps and antenna inductances and also different firmwares… we are trying to dig to the bottom of the pile to find an actual manufacturer not just a reseller… but it’s sorta like trying to dig in sand… it just keeps collapsing in on itself. What I’ve learned is that manufacturing in China is like a putting together a giant jigsaw puzzle with 10 other people who bring their own pieces and trade pieces with the puzzle pile and with each other. Finding who actually makes a particular product is kinda not possible because everyone is just swapping parts around… and between part makers and knock off part makers and part traders and part duplicators … it’s very difficult to nail down exactly what’s going on and where things are coming from … back to the sand analogy… like dunes in the desert, there are many mirages, everything is fluid, and anything can change at any time. On one hand it’s kind of exciting if you’re there in the thick of it… you can pretty much get anything you want done for a one-off or a small batch or an entire production run… but that’s it… the next time you try to get the same thing done, things will have changed and your once exciting adventure cobbling together some new thing is now an arduous, tedious grind to replicate… so it’s absolutely maddening trying to coordinate a solid supply chain from abroad that is stable and reliable and repeatable.