Peraspera, what are you using for a lanyard arrangement? A pouch style? Other than making a similar style in, say, 1300 mAh, the thing I'd like to see on the VV3 would be an attachment ring for a regular clip...
I emailed innokin about wanting a lanyard for the iTaste VV 3.O. They said they would be offering one soon but didn't say when. Also, it is likely quite rude by Chinese social standards to tell someone something that will disappoint them so you can't always know if what one is being told is the truth.
I put an o-ring on the beauty ring of my Pro tank as well as my new Vision Aurora BFT. Then I attached the lobster claw clip of a lanyard to the o-ring. The shape of the beauty rings keeps the o-ring from slipping off.
I also had good luck with using an a-ring on a cone-shaped drip shield over a 510 dripping atty. I initially thought the o-ring would slip off due to the shape of the drip shield. Surprisingly, it stayed put. An o-ring might work with a mini Pro tank but I haven't tried that yet.
The purple drip shield pictured in this post is the one I used successfully with a o-ring and lanyard. The top of the shield is narrower than the base.