I had a piece of 1 inch plate hanging around and jury rigged a bottom bracket holder. It worked pretty well. Need to work on the bottom bracket holder some more to get rid of the washers as they are not strong enough. But like I said it seemed to work well enough for now.
Close up view of the bottom bracket holder. Had some old machined tractor parts hanging around that worked out quite well. Drilled out the plate and attached the fixture and was able to cold set my first seat tube / bottom bracket assembly.
