Yah, I'm probably not done messing with that plane mirror.
Looking up top, I noticed that the screen's wooden frame is slightly cracked open on one side; thus, that corner of the frame doesn't slide forward all the way when you lock the screen in viewing position. Which means the big mirror is also misaligned.
Note the gap on the right side, between the screen frame and the control panel frame:
I guess these things happen when a fragile, heavy cabinet is trundled around from house to house over the decades :-(
I was planning to remove the canopy anyway, to give the big mirror a close inspection. Now I have two reasons to remove it!
Regards,
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html