A thing to watch for , when filling Angel Adjustable Air, is the burst disk going, this, as iv had confirmed, is quite a regular thing. a simple way to solve this, is switch the marker on, (without paint, duh) switch any eye system it may have off, so basically you can dry-fire the marker, and when your filing it up, if the burst disk pops, simply pull the trigger a couple of times. if you catch it quick enough, 99% of the time, it stops the leak. then carry on filing!