Used the Peregrino today. Inspired by a SOTD pic from @Rotter1 I dusted off the Extro Fra Rinik. Glad I did - brilliant lather and this brush performed fantastically. Certainly a better performer than the Yaqi Chianti.
I'm impressed with these PAA brushes. Available from UK suppliers, cheap and excellent performers (with low glue bumps). What's not to like?