[alpacassei]

Its a good set up for the cage size! If he’s not showing signs of stress (bar chewing, pacing, etc) then I wouldnt worry about upgrading him for now). Although the cage is 10cm below the minimum, every hamster is different and some do prefer a smaller cage.

I’d keep on doing what you’re doing and following M&Ms advice. Both my male Syrians are tame but they prefer to be left alone most the time and freeze if you suddenly catch their attention, its just instincts really.