Having recently flown CO 752 F flat beds for the first time transcon, I am now ready to switch all my travel from UA ps F to CO 752 F.

Do you think it is pretty safe to expect that flights towards end of schedule will remain as 752s? Have these 2 daily flights (later morning ex-LAX, mid-afternoon ex-EWR) been stable 752s for years?

What is the timing for the UA ps premium cabin refresh to flat beds?