I've just downloaded the manual as although both PAs are live , only one is
getting a feed , something wrong with DG211 or the rear power selector or
something.
Manual does not include how to dismantle or mantle.
One tip is to cover the valves with some dense foam a bit longer than the
valve tip , supported by the too short standoffs , to protect the valves
when turning all this metalwork over for probing etc