I thought my blasting cabinet was good when I initially set it up. It ROCKS now! I made a couple final modifications and basically turbo-charged it. The earlier video is here:    • Harbor Freight Blast Cabinet Assembly...  

This metering valve made all the difference: https://amzn.to/37zTEyX

These Milton fittings will supercharge all of your air tools. Can’t recommend them enough: https://amzn.to/2VVShan

* I get a small $$ referral if you purchase from these links. Regardless, these are the products I bought myself so I stand behind the recommendations.