This all starting too sound much more complicated than just typing the Latin letters. Going through either set of board jigglings and adding the need then to retranslate the result into tp just about ruins the whole scheme (lovely as it is) for me. Even a 12 x 12 matrix with tp words in the nodes and a punch character producer would be less effective than just that same matrix and sending two dodecimal numerals for each word -- and that (by saving steps) is less appealing that the two letter codes for tp, which doesn't appeal at all.
Still is pretty, though.