You're welcome!
Quick update: I've started refactoring UsageChecker. It's a less-known tool that reads code files, sound files, and SNDINFO, then prints out if there are any unused assets. Unfortunately, and somewhat ironically, it does not detect good code like the usage of #### frames. Thankfully, you can ignore files/folders so those don't clutter the output if you know that they are used. This, I'm afraid, is unfixable unless I were to write a ZScript/DECORATE parser, which really isn't gonna happen anytime soon, if at all. At least it works with sounds. Sprites also work like 80% of the time. Might be some time before I'm done with the tool. There's a lot of stuff to refactor.