Please, QuickBooks team.  What would it take for you all to include this ability to allow for a 'custom detail type'?  I get that the relational schema on the backend is likely quite intricate and fragile, as most are.  That being said, you can always ask us (the community), or a subset of us, to help.  As an alternative, LLMs like ChatGPT or Llama 3 (among several others) have been a wonder for my business with respect to completing similar projects. It's straight forward to do. Feel free to reach out to me and I'll show what I know, with the intent of getting your process started.