Yea, all the connections are fine. I have given it a massive clean up and ran some thinners through it. I will give it ago 2moz and see how it is.
Bubbles usually meen that the air doesnt go through the nozzle. or doesnt even reach the nozzle.
http://www.youtube.com/watch?v=8oVOl5NZCuc
http://www.youtube.com/watch?v=yS4ZlEMsDWY
Two videos on how to troubleshoot
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