I have had my Anycubic Photon for just over a year with variable results. I recently upgraded with the Twin Rail and Levelling products from here: https://jacksonproducts.net/shop/ols/products. I also upgraded the firmware to v4.2.18. There was no immediate improvement but then I followed up with a new Elegoo LCD screen. The printer has been transformed. I have been printing solidly for over a week with 100% success, no relevelling, no cleaning of vat or platform just one print after another.
So far I have only using the Anycubic resins. Does anyone know of a resin than can be glued to plastic components using a solvent like Mekpak or Butanone?