I'm not so pessimistic or certain and I'm always prepared to accept when I'm wrong but I can't see why it wouldn't work. In fact I still think it's a better way to do it. I don't see any reason why it would clog up because the grit stays out of the valve until it goes through the metering flap then it's straight through and out the blast pipe. The way yours and I assume Clemco's works (if I've picked it up right) seems more likely to clog. I can't try it out now as I've drilled a 4 inch hole in the bottom of the pot! We will see and just think, if we didn't try we would never know.