Evola wanted to publish a book called the Secret History of Secret Societies, based off of exclusive docs he got from the Nazis, but the manunoscript was destroyed in a bombing. It seems like he was also tasked by the SD to try to remove some of the "antitraditional" elements from FM rituals.

“There have probably never been as many people calling themselves ‘Rosicrucians’, or even ‘Rose-Cross’, as since the time when there have no longer been any authentic ones.”
— Insights into Christian Esoterism, Ch. IX: “The Rose-Cross”