Hey! I'm having trouble understanding exactly where each filament should be "loaded to" -should they be just before the splitter? in the splitter? and where do we count the loading and unloading measurement from for switching? (I'm using an Ender 3 pro with the stock extruder). is the measurement from the gear drive to the hot end? or is it supposed to roughly account for the length of the splitter and little bowden tube? How should things be at the start of the print? should colour/material 1 be loaded in all the way to the hotend as usual, or is there something different? Thanks!