On and off for years, I've been working on this historical flowchart of liturgical variation, expanding from the work of the liturgy scholar, Dr. Joseph Heinemann. (Boxes in the chart with a black outline around them come directly from Heinemann's original diagram.)If you have the knowledge, you can help improve this chart. The current version is 3.5.4.Just in regards to the Portuguese/Lisbon branch of Sepharadi minhag, I'd be grateful for any corrections. (I don't think I have it correct - and I'm not clear on how the nusaḥ, compared to other Sepharadi traditions, was impacted by anti-Kabbalistic/anti-Sabbatean trends in the 18th century.) If you can, please support your opinion with a reference to any siddur that attests to it.