Re: Poor instructions
"[...] for shellac 78s which were really heavy."
My grandfather in the 1950s had Handel's Messiah on 78rpm 10 inch shellac records - at about 8 minutes maximum per side. They were stored in sleeves in a large binder-like case which was very heavy - possibly containing the full 2 hours 30 minutes of a performance.
They were played on a clockwork wind-up gramophone with steel or thorn needles. The volume control was effected by varying the amount you opened the cabinet's front doors. As kids we used to play "The Hallelujah Chorus" while sliding the speed control backwards and forwards across its considerable range.
Many such records in the1960s ended up as flower pots by being warmed in an oven then moulded into shape - with the drainage hole ready made.