All important information that needs to be documented. I had no idea about this other iroha method. And I guess all this time I was reading bunkafu and didn’t even know it! 
For Juita, I learned a different tab notation system that used different numeral systems for each string; Kanji with イ for string 1, kanji alone for string 2, and Roman numerals for string 3. It was written vertically, and also employed Italian dynamics. I wonder what this system was called…