I'm not familiar with the ANT, but have you tried using both of the pins in your hybrid set up? It doesn't screw on completely? I'd there a gap? pictures of the problem?
I'm not quite understanding your 510 adapter issues either. Are you assembling it after you removed the Heron's gpin and insulator?
If you post in the main vapourart thread, you'll probably get quicker and greater volume of responses as there is more traffic there.
On the 201 side, the ANT is pretty much the same as the GUS or Paps. It comes with an adapter so you can use 510 attys (a brass ring that screws on the 510 post to give it 201 threads & an insulator since the 510 pos/neg are so close together). Without the adapter, you're just looking at threads & the top of your battery.
I didn't see that the pins were of 2 different sizes, but unfortunately I was already using the shorter one with the shorter spring. It screws on just barely enough for the threads to catch... I suppose it would technically operate, but it would take much beyond looking at it really sternly for the Heron to come flying off. It's maybe one thread holding it on. The only thing I can think of is to shorten the spring a touch, which may still happen, just not on a device I just received & is potentially getting sent back.
For the 510 adapter, I remove the spring loaded pin insert & try to screw the adapter on. It won't. The only way to put it on is to remove the screw holding the 2 parts together.
(PS, the screw on mine doesn't have nearly that wide or deep of a slot)
...And remove the black insulator/contact, screw that in like I would the spring loaded pin. Then I can screw the outer part on & put the screw back in. It will not screw on or off as one piece. It's a PITA but workable, the main issue is that soft brass screw that barely has a slot in it.
I can't believe that's the way it's intended to be installed, it just won't screw on or off without disassembling it. At first I thought it was just because the threads on the insulator didn't match up with the threads on the outer cap, but if that was the case, it should've screwed off as a single unit (installing them separately should have lined them up). It will not.
I'm pretty handy & not exactly a neophyte when it comes to building on different platforms. I understand how it's supposed to work. It's just not. I just don't know if mine slipped by QC while they were on coffee break or if the design is just poor. I'm guessing & hoping the former from all the great things I've heard about GP. I'm at the 2.5 hour mark now. Still haven't vaped it yet. Partly because I had to put it aside for a bit so it didn't get launched across the room.