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I would probably leave the fusistor alone until you have a more stable power supply. Personally, I would replace the E-caps outright before attempting a power up. Your set it much too valuable to risk having one 'reform' and then explode later. If your fusistor is blown, it probably went up for a reason.
But some nice news is that the filament string is going. Do the filaments on the CRT light up? If so, you are about as far along with that until you can get to a CRT checker.
You're right about those flybacks getting toasty. Just on visual inspection, how does it look to you? If you see any major cracks in the donut, or dripped black wax everywhere...trouble. If you see some black sooty stuff lining the high voltage box; that's not so bad as that kind of stuff just gathers in there.
If you don't mind my asking, if you are going for a rebuild, are you going to do it yourself or are you going to ship it on out? If you are a DYIer, I'm sure there are some AKers close to your area who can test out your set for basic worthiness.
good luck,
wade
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