My £0.02.
I’ve got loads of fake mounts, they’re fine, apart form the ‘3M’ sticky pads which are rubbish compared to the genuine ones.
The mounts are sometimes a bit tighter, no bother, just needs a bit of a twist to get it in/out. The CNC mounts are far better than even the genuine plastic mounts, and no more extraneous thumb screws to catch on stuff.
Lanyards/teathers. I bought an aluminium lens surround which had an attachment point. A bit of 1.5mm dyneema and I just tie it to something solid every time (only ‘lost’ it once). Takes less time to tie a bowline than it does to think about it and it does the job.