It's interesting to see how creative the D&D community can be when it comes to homebrew rulesets. Creating your own ABDL homebrew sounds like a unique endeavor!For such a ruleset, you could consider incorporating elements like character traits related to bladder capacity and the ability to hold. Maybe even add special items or spells that relate to ABDL themes. Ultimately, the key is to make it enjoyable and engaging for players who share this interest. Don't be afraid to roll a die and experiment with different ideas. The beauty of homebrew rulesets is the flexibility to tailor them to your group's preferences.