It took me a few days to figure out that I was having this issue as well. 45 mm was great for months, but started to get loose - especially as the day wore on, combined with the weight of the cage. Per my KH’s suggestion, I switched to a 40 mm. The difference was dramatic, as everything pulled in much closer. Then the temperature dropped and I was in varying degrees of (not the good kind of) agony.
I tried again for a few days, but it ended up causing some mild damage (especially as the cage was too small.) My KH stopped that immediately. The steel knock offs have been a great learning tool but their utility has run its course and I’ll be moving into a Contender soon.
For the gearheads in the audience