Prototype set is here

[Electronic M]

If i were you I'd keep the CRT mountings as they were originaly. The possibilities of stress/breakage that come form sitting in, and mounting/unmounting the CRT in a setup that supports the front of the tube with the cabinet, and the back of the tube with the chassis frighten me. It is your set so do what you want, but if I were you I'd avoid doing that with a prototype CRT that is worth a few grand and which is one of only a handfull of survivors (though something like a 10BP4 or a generic 50's 21" I'd consider subjecting to that risk).

Tom C.