This is almost too dumb to mention, but after years of struggling to prop up
heavy chassis on my workbench, it finally occurred to me to screw some heavy
corner braces into the chassis mounting holes. Doh! This is especially handy
with this particular chassis, which is narrow and heavy. If you put braces
on all four corners, you can even turn the chassis upside down without
crunching original components.

http://antiqueradio.org/art/temp/chassisholder.jpg

Regards,

Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html