I'm chugging along with my home made blast cabinet. I did purchase the TP plans for a few bucks but that wasn't good enough
Their width was 34" and I wanted more. So, I busted out the old math book, did some trigonometry, adjusted the hopper along with angles and drafted it up in CAD. The attached picture (hopefully) shows the initial drawing. If anyone is interested, I will document the whole construction and post it on my website. I promise you the measurements are spot on and if anyone want to build the same one, your cabinet will *fit* together just fine.