Well I'm wanting to keep cards close to my chest so if Bibblebub or anyone else does want to have a go then message me at [email protected] and I'll send you the coded message and an explanation.
In the long run I am hoping to use the code in a puzzle that I have yet to write. Releasing the code in an accessible place before that puzzle gets published (if it does) is something I don't really want to do.
Because it's in a puzzle, though, that means that this code needs to be solvable -- and that's what I'm hoping to test here.