I laughed when I read 'broke the stone pipe', but something I could see myself doing as well . Broke my daily use piece myself yesterday, then had to run out and buy a twin so I'd have a useable piece , wish the glass in transit would just arrive already. I love how these seem to come out when I am just thinking, 'these stems are looking kind of brown these days'. Are the 14mm fragile that you'd have to worry about popping the wood when putting the glass section back in? I guess they'd have to be, just wondered how much they should be 'babied'?