Good thought, and I know what you mean. I do tend to hold the cable steady "back it up" while holding the nut with each partial turn which alleviates that problem except for the last half to full turn. But yes, that could certainly play a role slightly, though I've mitigated most of the issue.
^^ I found this trick by accident and it does work well. I still don't like the hifiman connectors. They are just hard to work with and if you ever cross thread one you'll have to send them back. Also the you have to exercise a lot of care that you don't damage them due to how far they extend away from the cup. Not to best design IMO
Yeah it does bug me how far they extend from the cup and have a habit of poking yourself in the shoulder with them if you put the headband forward on your head....it really iss a kind of sketchy design choice.
On the other hand I look at the friction-fit bipin plugs on HD650 and am reminded of how much I otherwise like the HFM SMC connectors