When I fabricate the main tubes on a frame I use tubing blocks to clamp them into the mill to miter the ends. For the rear stays (ie. chain and seat) you can't really clamp them individually. It is more accurate to put both sides of the stays in a jig and miter them at the same time. Unfortunately these jigs can cost several thousand dollars which is why I have been filing them by hand even after I started using the mill for the main tubes. My solution was to brush up on my milling skills and fabricate my own jig. While there were a couple of issues along the way I finally have a solution that works pretty good!
In other news the latest road bike frame is nearing completion. It is ready to get the stainless media blasted and the lugs and fork painted white. Some day I will do a complete stainless bike, (probably the same time I decide I need another hole in my head) for now, this one should do me just fine.
Next up, Tom full suspension! (and I thought stainless was "interesting")