Sand blasting cabinet dust collector

details here: https://imgur.com/gallery/v3V6D/

Summary from the imgur post:

Finished picture first. This is my sand blasting cabinet. It's a Harbor Freight special, with a long list of upgrades. The latest upgrade is a little better dust collection system. The original Harbor Freight design had the vacuum on the left side of the cabinet, and there is a hole on the back, in the top right corner. Air flowed from right to left, taking the dust with it. The problem is that the gun for the san