It's such a beautiful plant. Have you ever experimented with not giving the plants a cold dormancy? The shorter days of winter and reduced watering seem to provide a condition for dormancy and the cactus still bloom in my heated home. I suspect the brown on your cactus is cold scarring. It adds interesting character. I really like this plant and all of your collection. Thank you.

What a lovely little red flower! TBH I've never really been into cactuses (cacti?) very much but when they flower, the flowers seem extra luminous in comparison to the main cactus body. Cactus seem to be only one colour. But now I feel like going to the nursery and buying one to try and make it flower!