This topic is made for everybody who wants to modify their UCS Hulkbuster Ultron Edition (setnumber 76105). I will update the OP when new mods are posted in the topic.
There are a few points people would like to see modded, which are (credit to @Scarilian):
Here are a few mods I've spotted recently:
MOD by NYESSbOss on Reddit
MOD by CX52J on Reddit
Potential moving leg solution MOD by @Leewan
MOD by Chezzymann on Reddit
Mod by @Warbinator
Mod by @chubbybots2
If you have a modification you want to share, post it here so everyone can enjoy it.