It's always interesting to see how different all our experiences are. I'll never be able to go away from a glass bed after using one. FF sells glass platforms on their US store for under $20 and those buggers are 12 mm thick. There's no bending or warping something like that. I think you say you haven't been able to get away from rafts? I've never really had to use them, but then again I can't print on metal or Kapton tape either, no matter what I try. Nor can I print directly on glass, regardless of temperature, first layer, or leveling tweaks. Blue tape and glass with a heated bed at 50c (which everyone says shouldn't be necessary) is the only thing I can get to work time after time.