Thought you guys might like to see the Z mounting system designed by Tom Bradshaw.
I think this was in the early 60's and maybe he will chime in on that detail.
It was getting the pedal steel guitars to be less wobbly.
The PSG was built by legendary Chuck Wright who started to build them in the late 40's or very early 50's as "Sierra" steels guitars.
This is in Bob Muller's steel guitar collection.
Bob said this PSG weighs about 100 pounds in the case!
This is a photo of Chuck Wright with a very early pre-Sierra steel he had built.

Inlaid Star Guitar 2006 by Mark Giles. SD-10 4+5 in E9th;
http://luthiersupply.com/instrument-gallery.html
2017 Mullen SD-10, G2 5&5 Polished Aluminum covering. Custom Build for me. Great Steel.
Clinesmith Joaquin Murphy style Aluminum 8 String Lap Steel Short A6th.
Magnatone Jeweltone Series Lap Steel, Circa 1950? 6 String with F#minor7th Tuning.
1956 Dewey Kendrick D-8 4&3, Restoration Project.
1973 Sho~Bud Green SD-10 4&5 PSG, Restoration Project.