a) Just another case of someone going to the trouble of inventing something to try and get around a problem, when the real solution is to train the humans better in the first place. Still open to misuse in untrained hands therefore...why bother? b) It wont be any good if it doesnt SELF CENTRE while it tamps. I have no idea if it does or doesnt, but have seen other tamping jigs with the same issue so the idea behind the jig still may not address all the problems it is designed to address. If it does actually self centre and result in a straight across tamp, apologies for my scepticism. c) I still reckon its a beer bottle capping jig placed onto the grinder so you can grind coffee and cap your beer bottles at the same time.....very efficient really π π Rgdz, A