One thing that was missing the Tina2 is a filament runout detection system.
So I designed one and modified my Marlin2 firmware to detect filament runout whenever the X min endstop is untriggered because the pin for this endstop is not used (I could have choose the Y max endstop pin instead which is also unused).

This feature is really a must have if you don't want to find your Tina2 printing in the air and waste time and filament on an incomplete (and therefore unusable) printed part.
My design uses one of the most common and cheap enstop you can find and works incredibly well.

Weedo Tina2 runout sensor, Feb 2022

Weedo Tina2 runout sensor, Feb 2022

Before testing it "for real", I first checked in Pronterface to make sure it triggers and will work as intended : 

Weedo Tina2 runout sensor, Feb 2022

And here is a small video showing it in action.