I have a HF blast cabinet and like every other one they produced mine leaked quiet a bit. I did some Google research and found
many ways of upgrading these HF cabinets.
In the end I completely dismantled mine then, reassembled it with silicon in between the cabinet pieces. I also upgraded
the gun and pick-up tube. Installed LED strip lighting, a small shop vac with a
Dust Deputy, added an air dryer, and regulator.
It probably took 6 hours and cost me $300. It works great for me now.
My $.02