So recently I've purchased a VTR, AGA-T and a Protank. The VTR and AGA-T just arrived over the weekend, but I'm having some troubles now... The AGA-T doesn't fit - I guess that isn't a problem as much a lack of research... The Protank, although works nicely, cannot be tightened down all the way or there is zero airflow. I have to loosen it until the point that it rattles a bit in the VTR "sleeve." How can I correct this. I prefer the protank since I can rebuild them otherwise I'd use the i30s that came with the VTR.