I have a new tutorial up:
https://www.youtube-nocookie.com/embed/aXA8DNu8eRs?autoplay=1
This one is aimed at people who'd like to make their own sounds but have never programmed a synth before. It establishes some useful building blocks and a starting point for future lessons.
I would appreciate any feedback; I'm still pretty new to making these and would like to improve 
Here is the same video proxied through my Invidious instance:
https://invidious.franklyflawless.org/w ... XA8DNu8eRs
I will be using Surge XT for at least another six months, so this will be a useful resource to consider. My interest is in creating patches similar to "Solo Strings", but for other acoustic instruments. Thank you for sharing this Max.