Most people don't realise the minimum is always changing, you have to spend enough time on the forum to notice it. I gave up paying attention to what people are calling the minimum a while ago and have developed my own way of deciding on caging for my pets, they start in something small (often a mini duna for dwarf hams) and just get bigger later if they seem to want it
I'm glad he seems to like his cage as it is
He sounds very sweet