Thanks Stan, great suggestion! I've been tryimg without success to fimd a -833" stem for my horrible Huffy MTB frame over here in the UK - even old BMX stems in this size are silly money and I don't want to spend much on such a junker. Just building it for fun really as it's so grotesque it's beautiful - front droputs are squashed together fork tubes, rear dropout slots look like they've been cut with pinking shears and the bit in between is even worse! Was given it as a lump of solid rust because it had sat for a year in the salt air of Dover and it took a lot of muscle to salvage. Had to cut the stem out of the forks, however the frame tubes are so thick & heavy that the only rust was external surface rust on the scratches. After stripping to bare metal. Waxoyl treatment of tubes & gloss black enamel respray it looks smarter than new. Have experience of "precision sanding" as I reduced a carbon seat pillar from 27.2mm to 27.0 mm and it's a perfect fit - took four hours and a micrometer though!