Hey Ruben,
This custom element layer certainly seems like the route that would work -creating it from scratch would give you control of how you want that layer represented in your drawings as opposed to placing it on another ConDoc layer and modifying the settings to get it to appear how you want.
There’s a great video we have that covers creating custom drawing sets that you can reference here: https://vimeo.com/273917714
Since ConDoc is configurable, as long as you save and load your custom drawing set, you can pretty much use it however you choose.