Ideally identifying which and dismissing the roady would make more sense for
this locally based, but made big-time band.
Failing that - concerning cut grommets encircling valves to act as retainers
in inverted amps. Lining the holes in the chassis where the valves pass
through .
a/ fairly rigid rubber of otherwise standard trunking grommets
b/ fairly tight to the glass envelopes to function as retainers.
c/ obviously they do no take much a jarr to cause breakage as no obvious
damage to the cab.

The 4 o/p valves have spring retainers.
One of the ECC83 quite neatly split in a ring where the grommet lies and
white cap.
I am thinking of running my plaited, high temperature silicone cord "rope",
over the tops of all 6 of these small valves , located over the top "pips"
and anchored to the chasis at the ends.
Any comments pro or con ?

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/