Glass bed delamination and glass replacement

[ray]

@troublebot

I did remove the PET surface, I actually had better luck printing ABS on bare glass with a little bit of the ABS juice.

Other users have also encountered flaking or delamination when removing parts when printing on bare glass. We recommend printing with either the stock PET surface, or with the new PEI print surface that some of our more advanced users are using with great success.

Thanks!