Not being a 'Yammie', I've not had the need to use the PSR tutorial site, but man, have I gotten a wealth of knowledge from here ... even just reading posts that were helping OTHER people, or someone talking about how they solved a problem of their own ...
And when I was early in my transition to KORG days, just before a gig I had to get in touch with Donny for something I was having a problem with ...

the help from S-Z has been amazing, and of course the first "THANK YOU" has to go to Nigel ...