I love these dual mode displays. I remember the crowd and not so long ago that discovered and bought the TFT but had to keep the LCD12864 screen. Always the excuse about babystepping the z offset or something along them lines if i remember correctly. Well these screens have to be wired both ways. That is the 5 pin tft harnes that has =5v, gnd, reset, rx, and tx and also the 2 ribbons that connect the exp1 and exp2 connectors on the mainboard. But once its all together we push in and hold the knob down for 3 seconds and it brings up a menu to let me choose which display mode I want to use. I have my base calibration of marlin 2.0.5.3 loaded in and here is my display in LCD12864 mode..