Question about flybacks circuit changes

[Electronic M]

1.) and 2.) (Assuming filament opens and doesn't short to plate or it's self) HV AC on flyback shoots up (possibly by as much as 10-20 kV), winding insulation survives a few sec to a few hours depending on flyback, then insulation breaks down, windings short, fuses open or things catch fire... assuming 0 human intervention at any point halting the process.

3.) Flyback and plate current in the output near 0 and no sweep. Output grid 2 current very high as it becomes the effective plate of the tube. A few minutes to by and the tube may be damaged. Flyback probably won't be harmed.

4.) Dunno.

5.) IIRC plate current and HV low. Risk of burning vertical line into screen. Never let it or heard of it going long enough to cause failure.

6.) Cathode current will vary with brightness in a fairly predictable manner...I think I've ran brightness from dark screen to blooming with a meter on it before....if no regulator in the HV average brightness will modulate the HV some.

7.) Predictas have a width control that adjusts screen. Too low and there is no sweep/HV It obviously modulates width and HV, and too high can overdrive things and cause HV breakdown.