Creating a 'Movable DO' clef for music instruction

I'd like to use a strange clef, but it is useful for music instruction. It is called the "Movable do" clef, as used in Kodaly pedagogy. It is a very helpful tool in teaching beginning students sight reading/singing. They can use the "do" clef as a precursor to learning key signatures. It's much easier for the learner to simply see where 'do' is indicated as opposed to a key signature. Once the learner becomes accustomed to reading intervallic and movable do on the staff using the 'do' clef, introducing key signatures becomes MUCH easier for them!

I can see how it is complicated to implement because one must be able to move the 'movable do' clef to whatever line and space they like. Meaning, as a teacher I want to introduce and acclimate their eyes to reading in the key of F on the treble clef, I would put the 'do' clef on the first space. The learner would clearly see the spaces are DO, MI, SO, etc. They wouldn't be distracted or intimidated by extra visual information of key signatures.

Please see attached PDF for clear explanation and application.

Just think... this ONE feature could be used to teach thousands upon thousands of young music students to sight read from the staff!! It may seem like an obscure request, but the implications of this feature are broad and far reaching. Massive positive impact on the music world!

Thanks!!
-Martin