I would want to use RepRap as a tool in a free tool chain for creating free hardware. That is "free" as in free software foundation. I think stuff must be easy to copy before making it free makes any sense.
I don't pursue a fully self-replicating machine. It seems easier to make a self-replicating toolchain, consisting of many different machines that support each other. So I like RepRaps best if they're simple and mostly-self-replicating.
I don't want to use or develop on top of non-free or dangerous stuff. I want safe and free.
I have made babysteps on a design, codenamed Hangprinter.