**4 April updated with pictures below**
Seriously! I took the sawzall to it, hacked right through the seat tube and the down tube. I must say I enjoyed it.
...I am starting on my project to make a "Ritchey Breakaway" style travel frame. Thanks to 23skidoo from this forum who donated the Soma frame. I'm using a Ritchey style double seatpost clamp that will hold the two halves of the seat tube together, and a sleeve with two pinch bolts that will hold the down tube together.
Nova had all of the small parts to make this easier; I bought a seat clamp lug, several cast steel pinch bolt assemblies, a stainless steel piece of tubing for the down tube sleeve, STI cable adjuster stops, water bottle braze-ons, etc.
Today I cut the seat stays loose from the top lug, for later reattachment to the second (lower) lug. I used a 3" piece of stainless tubing sized to slip fit over the down tube, brazed pinch bolts to it, slit it -- voila, down tube clamp.
Next I have to braze the second seat lug, along with modern style cable and STI stops. Then I'll shorten and reattach the seat stays. I'll post pics in a day or two; wish me luck!