Extraction only fingers of one hand , no wiggling required. Insertion
force 3 to 4Kg far lower than usual. C frame around and under amp
connected to a spring balance and a block of expanded polystyrene , off
amp deformed with impressions to take top of C and top of valve.
All 8 laminations bolts for the 2 Tx are loose to the point of nuts soon
to be dropping off for 2 of the mains TX bolts.
One of the seriously cruddy output fuses, with LED indicators, has
highly suspect contact where the end cap quarter-turns in, so yet again
having to replace these pcb mount fuse holders