Deve,
Had been looking at the TP Tools blasting cabinets for the past two years as I was contemplating cleaning all the attachments to my 235 and the block, valve cover, and oil pan. Cleaned the block and valve cover using multiple wire brushes and an electric drill. When I rolled the re-built block over in the engine stand and got about a third of the way through the oil pan with the wire brush and drill combo, I pulled the trigger and ordered the blasting cabinet. What a good decision that was. Went with a big cabinet to use for larger pieces.