R2 Cooling Tray adapter .stl file adjustment

Hola from Costa Rica,

Inspired by Bill’s amazing “clean setup” I am on to build mine for the R2.

I would need the adapter to have a 3" OD instead of the original 4".

As I never used 3D software, I wanted to ask if anybody in this community could help me with the .stl file? :slight_smile:

Thank you & happy weekend