Thank you! I've followed your indications, and it's already very much better. I've made 7 minutes without anything untoward taking place.
As I did what you suggested, one of the options (I think it was Canon wrench 2) seemed to imply that the maximum time before it behaved badly would be 30 minutes. It's already 1 in the morning here in Sicily, and I've been struggling with it all for over three hours - though progress has happened, thanks to you - so maybe I won't sit out the 30 minutes to see what happens. Tomorrow is another day.
And anyway I expect I'll have other stupid questions later, but you have been absolutely helpful! When I find people helping each other freely like this (and the whole ML project as well is an example) it gives me hope that we might make yet it as a species, despite everything else the news tells me. To put it another way: you guys rock. Thank you again.
