Eero, by judging the flame (and those tubes) it's on natural gas with compressed air, makes a impressive noise!
I like these old pics, Always a lot to see and learn from, the bench next to it has a sign that says 'Norton' on it.
Steve, you made me laugh again (again!) Yep, the second frame will overtake itself right now
And yes , I am going over the top with this jig, last time (with Burney) I used a steel pole outside, this time with two frames to do I'd give it a go with some surplus U shaped bits....