Here’s a link you may want to bookmark. VA FAST Letters are issued to tell VA raters how to rate a particular subject because the learning curve is pretty steep for their employees. Well, that and the immense turnover of knowledge. The CAVC is constantly undermining the M 21 and it requires about 135 changes per year to stay current on VA regulations.
https://vfwilserviceoffice.com/va-fast-letters
Win or Die