I just want a drawing plane that I can draw on, and then project the curve onto a object if I so chose.

Kinda how PROJECT already works, only it allows X-Y-Z plane drawings to be projected.

I just want a arbitrary construction plane. Once I have that, I can draw on there and then project it as needed. I'm not asking for full blown realtime curved surface drawing.

So arbitrary construction plane, with some easy way to create one tangential to a surface, and have projection work with that.