PA blaster made from a discarded 30 lb. propane tank and scrap tubing & perforated steel plate.
I have seen plans for these for a long time and wanted to build one.
It does work much better than the siphon feed system in my blast cabinet.
The fill funnel was made from a portion of a 21 lb. propane tank and a piece of pipe. It allows the use of a screen and avoids spillage.