I can't believe after all the grinding you've done that you haven't purchased one of these. I don't necessarily like the phrase, but it really was a game-changer once I got one. Same with my blasting cabinet. Plus 50 lb black diamond bags at Tractor Supply for only $9, and it's hard to beat (get the fine).
https://www.eastwood.com/ew-100lb-pr...e-blaster.html