Behold, Tim Williams scribed on tube chassis:

snippage

Steel is stronger, cheaper and all the other things that usually go with
it (like solderability).

Exactly!

Steel can encourage the "ground it anywhere" technique - what we want to
try and avoid :-o

--
Gregg "t3h g33k"
http://geek.scorpiorising.ca
*Ratings are for transistors, tubes have guidelines*