I was searching for any plans for a homemade sandblasting pressure pot made out of an old propane tank (thoroughly washed out of course!). Couldn't find what I needed. The bottom of the tank would be drilled and tapped for the outlet but how would I go about making the top cap? I currently have a small 5gal and I thought a bigger one would be better. I want to use my soda blasting converter from Eastwood to blast some aluminum rims. Any ideas/plans? Thanks to all who respond.