The new compressor lost 8.2 Bar in 22 hours ... Then I discovered, the leak was where I had fitted the supplied Euro QR! (The only joint the user has to make). The QR fitting was supplied with Off white coloured tape pre-applied to the threads. Couldn’t hear the leak, but Diluted fairy liquid was blowing 1” bubbles like crazy. Note the pic where the connector is screwed fully home. I redid the joint with 5 layers of white PTFE Tape. Almost as bad. Tried again with 7 revolutions of tape, better but still small bubbles. ( note fitting was fully in ). Redid it again! This time with 9 layers of ptfe tape. Much better ... almost leak free; but when I put some oil on the joint, you could just see some micro bubbles over a 5 min period. I thought 3 layers of tape was all one needed on a tapered joint? Am I wrong? Note the threads on the fitting and the tank, look clean cut and undamaged. Would It be better to redo it with 11 revolutions of tape or use something like Locktite 572? what is the best thread sealer that would seal these threads, yet undo without heat, or the absolute minimum heat.