Potters - Mr. Fancy Pants

Just kidding. Such a beauty.
I'll throw my hat in the ring to provide another source with regards to a Coral Beauty. Model citizen in my 210 mixed reef. I did notice it nip and tuck at assorted zoa's though. Maybe a captive bred / raised would be safer although I've not tried this.
I've also had a Flame but that was back in 1999 and I honestly don't remember much about it. I mostly had LPS at the time with Hammers, Frogspawn, and a rather large Elegance. I don't recall it bothering any of those but the Frogspawn did let my clowns host it in (or whatever they call that relationship).
Your on point with 'reef safe with caution'. Having an tolerance or acceptable risk mark is wise. Also having a backup plan or plan B is also wise.
Hope your day is going well. Potters - very nice.