Ive been printing with Frostbite plates now on a P1S and X1C. PLA is no issue at 30-40c, sticks like magic. PETG (several brands including PETG-HF from BBL) is a nightmare for warping. To the point im considering just going back to PEI.
Id say 50% of my PETG prints are unsalvagable, and the other I have to post process to deal with warping. I clean with soap and water, I level constantly. I tuned fans for cooling (and in some cases to practically nothing) and its rare I can get a large format print completed with out terrible warping. Small parts or parts that dont have a large plate footprint work fine with PETG.
IMO BTT products do not work well or consistently. I have Revo nozzles, which a few Ive had to replace, their support is terrible, Panda touch that is constantly not working or functions are broken, etc. I just think that I went from printers that were consistently well performing to regularly needing maintained just like all my other non BBL printers.
Would love to know if anyone has consistently good results with PETG-HF on frostbite plates and what they are doing.