Manuka, that is a very cool video and really shows how well a pole lathe can do in the right hands.
BW, when you say burgh to me I think Steeler country, had me confused for a moment there. LOL Been thinking about your automotive flywheel idea, thinner, larger and balanced. My circle cutter will go 24" right now, don't know if I need that big but at least I have the capability without building another jig. I have already passed the crossroads, this will be a hybrid design. I want to attract attention to my wares but I also want to have fun with it. Granted that big old pole sticking in the air would attract attention for sure, but a treadle would be so much smoother to operate.
H.A.S., balancing the flywheel will be of utmost importance to me. Don't need that much weight shaking everything apart including my teeth.
So far I am committing to a large heavy flywheel, have lots of 4x4 ash and rock maple that could be fashioned into a wheel that would hide the big hunk of metal inside.
A one way clutch to enable the wheel to coast if I stop pumping the treadle. Even have a crazy idea of lining the outside of the wheel with a sanding belt to be able to sharpen the tools.
Ball bearings and steel shafts with everything metal hidden as well as I can.
Step pulley setup, possibly made out of wood to accommodate a modern belt. Have to play around with that idea.
Still tossing around the seat idea, can't picture how exactly that would work out and may already have enough weight to keep the lathe stable.
Two piece unit for easier transport, top and bottom with a way to easily remove wheel to move it by itself.
The framework will most likely be the above mentioned ash or maple.
OK fire away, I need some Devils advocates, what am I missing or not seeing here.