Could you add more support type for flag "item-store"
I tested lots of storage methods, but the following types are not included.

• dispenser
• dropper
• armor stand
• donkey's packet
• llama's packet
  Furthermore, can you create a new flags which bond to themselves.
  So players weren't start to brush special ability items.
  Thank you for fixed the flag placement last time, that is really helpful to me.

This is the items file.
https://pastebin.com/txEyM6qS

Server version: git-Spigot-642f6d2-fbe3046 (MC: 1.12.2) (Implementing API version 1.12.2-R0.1-SNAPSHOT)
ItemJoin version: 4.9 build#143

Item-Store now supports dispenser, dropper, armor stand, donkey and llama packet/storage.
In addition, I have fixed a bug with item-store with non-block items in an item-frame instance.

Normally I would link the fixed snapshot and say it is safe to download, however, this feature has been pushed to the dev-branch that contains the new framework for ItemJoin which is extremely experimental and once complete will be uploaded for release on ItemJoin's spigot/bukkit pages.

So, for now, I will say this feature has been added and if you are interested in testing it you can try the latest snapshot in the dev-branch linked below. However, this is not recommended to use on public servers and should be used in a testing environment only, otherwise do so at your own risk.

I will post back and close this issue once the full release is posted on ItemJoin's download pages.
ItemJoin v3: Build No.12
Snapshot dev-branch; http://ci.craftationgaming.com/job/ItemJoin%20v3/

EDIT: I just noticed you also said;
Furthermore, can you create a new flags which bond to themselves.
So players weren't start to brush special ability items.

Can you elaborate on what you mean? I don't quite understand.

This feature has been officially added in the release of ItemJoin v5.0.0.
You can grab it here; https://www.spigotmc.org/resources/itemjoin.12661/download?version=254090

Please read the changelog as the documentation has not been updated yet;
https://www.spigotmc.org/wiki/recent-changes

As for the second part; " Furthermore, can you create a new flags which bond to themselves.
So players weren't start to brush special ability items. "

If you wish to elaborate on this, being something that I missed feel free to re-open this issue and I will be happy to look into it!

Thank you for the fantastic and well-formatted request.
This is simple enough for me to add so you will see it in the next version! I will post here once I have officially added it to a snapshot build so you will be up to date with the progress.