Need help with duping please! Paying with hugs :3

Hey guys! Been trying to dupe for ages and no luck! Was wondering if a pro could give me an absolute walkthrough?
Like, when exactly do I enter the vault, when exactly do I drop the last item and close the window? Like, do I actually drop the item then close window or hover the item and close window? Help would be GREATLY appreciated, thanks MPGHers :')

Ive had some success, but they usually go in bursts for me, i once had it 3 in a row, then i had to wait till next hour before it worked again.

I assume you already read most of the guides here so ill give you my version of things.

Server selection - I had most luck with Us EASt, but US west worked once and my weapon didnt disappear even after duping so it was strange.

I dupe 6 items, i found this to be most consistant for me.

You need two client open. You have first client in nexus, second client waiting to get in nexus.

The first client try to get in vault when when first blue messages appear, making the second client able to get in nexus while first client "hangs".

The second client should be the one IN the vault when the red message appear or is about to appear on the first client. (This doesnt really matter which character is in the vault so long one client is waiting to get in the vault while the other client is already in the vault)

Then you move all the item into inventory, and you click and hold the weapon from inventory and hover it on the first slot of vault.

Then a millisecond after the red message appear on the other client and blue text is about to come up or come up, you release your mouse click and immediately alt-f4 or ctrl-w to close the client you are in. (i mean immediately as soon as your mouse button is released, you type it. usually i have one finger on the ctrl key so when i drop it i press w to immediately close it out). Then if you are lucky the other client gets in vault, wep disappears and you made your first dupe!

I gotta say, you must have patience, i was ready to give up. My first dupe was after around 2-4hrs. Now i can get around 2-6 dupe per hour. The main part is to know when to drop your weapon and close the client, im sure this is different for everyone.

Tl;dr, Just play the game, it'll be too frustrating for you.