Banner Patterns

I have a few questions about Banner Patterns and some related bits. I am trying to make custom banner patterns for a server I'm on. Right now everything is on my local machine. I have created the banner texture for the banner and shield, the item texture for the banner pattern, and done what I thought was all of the JSON files. I am able to /give a banner with the pattern already applied and it works. What I can't get to work is the banner pattern item. Currently, I'm using custom_model_data on minecraft:paper, but that won't go into the loom. I can easily switch it to a banner pattern like mojang_banner_pattern, which allows it to go into the loom, but doing this has two problems I can't seem to solve: a) the item tooltip has "Thing" between the item name and the lore and I cannot for the life of me figure out how to change this and b) even though it's a custom item, it still only makes the "Thing" banner pattern available (If I use a different banner pattern item, that changes the "Thing" line to whatever the pattern I use is and changes the pattern that it makes available). So my questions are as follows: 1) Is there a way to make the custom paper item go into the loom and make a banner pattern available with it? -OR- 1) How do I change the "Thing" line? 2) How do I change the banner pattern the item makes available in the loom? Thank you for any help!