Well, it is November...
The heater came back into the workshop for the first time in months, as I started this batch of throwing.
It may be that the last (now deceased) scales were inaccurate, but the throwing weights seem wrong.
Perhaps I weighed out then, with stiffer clay? I don't know, but so far I've needed to add about ten per cent extra weight to get the right dimensions . I've checked that I'm not throwing thicker as well.
My hands are still achey but they are better for being back in use.
Back to the wheel now that lunch is over.