---

Well the air bubble appeared again after about 24hrs. I removed the old diaphragm and made a new one and soldered it into place. While I had the inside of the capsule exposed, I re-soldered all solder joints and areas that might be prone to developing leaks. I updated the project page with some photos of the newly installed diaphragm for those who are interested. If it leaks again the only place left is the joint between the acrylic globe and housing and for that I will use JB Weld.