Lars, it sounds like you have just the right setup to tackle this mod for your own bike too. With your fast riding skills and the triple clamps you already have, you might really like this change to the old steed. It really gives the front a more planted feel when entering and executing turns. Much more relaxed going quickly now and the clamps still keep everything nice and stable.
Since the Rotabroach dies only come in standard dimensions you will either have to make the hole oversized at .750" diameter or go undersized and file out to the finished diameter. Oversize is ok structurally but it makes it more critical to be able to align the parts for welding. Ideally, if you could get the .750" bit ground down to .722" diameter you could jam right through to the finished size. With a good repeatable fixture you could whip these out in no time...
