Printers are Sacker S2, Main board is an Azteeg X3 Pro with ViKi2.0 Interface. I currently have 2 of these printers so I can work on one and keep one running. This might be a blessing in disguise that I have to learn this, in theory I should be able to add some features like controlling chamber temperature and adding out of filament detection and routines for mid print filament change too correct? I am going to read the Repitier firmware instructions and see how far I get before I ask more questions. Is there anything specific I need to know about this controller to get started? Thank you so much for your assistance, I truly appreciate it!