Does any body know, if there is an actual and updated S2F model somewhere online 
The best i found, is this --> https://www.reddit.com/r/xmrtrader/comments/iiida8/monero_stocktoflow_chart/
The best i found, is this --> https://www.reddit.com/r/xmrtrader/comments/iiida8/monero_stocktoflow_chart/
The best application of stock to flow in Monero is in this twitter thread by @CryptoMorpheus_
https://twitter.com/CryptoMorpheus_/status/1310061241923235850