I could have titled this thread "How to void your warranty"!
Here are some things I have done to make my HF blast cabinet more friendly to use for my gun work among other things.
Here is the unit as it sat a few days ago. I added an extension onto the side today but I'll get into that later. The unit itself is sitting on an old metal cart. I cut a square hole in the shelf the blaster is sitting on so I had access to the drain hole in the bottom of the unit. I added a water filter to the side of the cabinet and cut a long slit in the top of the cabinet, and added a lexan window so that the flourescent light on top could shine into the cabinet. The switch turns on the vacuum and turns on the light. I can flip the switch with my knee.
Inside the cabinet you can see where the air enters the cabinet from the water filter. You can also see that the hose that carries the media is coming up from outside the cabinet, well maybe you cant, it's under the glove.
The hose feeding the media is shown below. It is connected to a copper "t" fitting at one end. The other end of the T goes inside the cabinet and picks up the media. The short leg of the T is a vent with an unsecured copper cap resting on top. This allows air to be sucked in behind the media which increases blast pressure and prevents clogs.
This is the pick-up end of the T fitting inside the cabinet: