Lots of people have done it, my version in the link below.
Just seen I didn’t finish the thread but I only use the pressure pot now in the cabinet, never the suction.
I used 3/4 inch claw fitting for changing between the cabinet and free blasting.
There is a thread on the blast pot somewhere as well.
I bought a blasting cabinet on the forum over 3 years ago and have been using it since. I already had one of the Clarke 10 gal pressure pots so I ended up marrying the two together. They work but not great and have some major flaws so I've been modifying them over the years and thought it was...
i use a suction gun in the large cabinet as well as the portable pressure pot all home made just poke the blast hose through the hand porthole and wear gauntlets the extraction is more powerfull than the blast jet so no loss of media from the hole