Originally Posted by
unterhausen
Yes, he said that the fixture in the insta that I linked replaced his older one. I'm not sure it's significantly more sophisticated than other fixtures I have seen. It's nice though. The blocks at the front are cut away for clearance. Otherwise they are just vee blocks.
The tubes are chainstays. They look to be something that is commercially available, but maybe he added some bend. The interesting thing to me is that they are mitered off-center. I'm not sure that was intentional to add a little more clearance. I assume they are for a bike with big tires. Some people use s-bend chainstays for road bikes, but these have more bend than would be required for that. These appear to be for an all-road or mountain bike.
Kris makes his own stays from round tubes. His Flickr feed shows the process that he uses to bend and smash them for clearance. The stays are offset mitered to attach lower on the bottom bracket, which I have found to be very helpful in allowing better torch access for welding around the stays and the rear of the seat tube/bottom bracket joint. It can get very tight in there with a zero offset miter on the chainstays, as the stays are often touching the seat tube.