Hi
@Tazz
The bubble glass came with the tank inside the official box thingy, so it should be an original. Once assembled the glass itself is a good tight fit at top & bottom, doesn’t spin or rotate at all (even when giving it a good strong turn), & no evidence of leaking externally from either end. That’s why I’m thinking the leak is internal where the coil screws in, like if the bubble glass is a millimetre or two too tall & stopping the coil going in as far in as it needs.
I put it all together again last night and so far I’ve only had a couple of drips during new coil run-in, so maybe before I somehow cross-thread the coil or perhaps some debris was stopping it tightening properly.
If it keeps working well I’ll chalk it up to user error & move on
Thanks for your input mate.