Here's my setup: New pre-assembled Chameleon Mk2, on an Ender 3 Pro, with Prusa Slicer. Trying to do a test print with just 2 colours. If I hold the switch for a second to home it, then 5 seconds to feed the filament I can pre-load the filament into one tube, which I'm assuming is Tool 0. Then hold for a quarter second to move to the next position and preload another tube which I'm assuming is Tool 1. I did see the trick in the video about easier loading, but I did it with the stepper to make sure it was in the correct tube and that it was indeed capable of pushing/pulling the filament. I stopped both filaments about an inch before the Y adapter. There's nothing going through the Y adapter to the printer's extruder. I used the gCode generator and put the output into Prusa Slicer's Tool Change gCode. When I go to print, lots of stuff starts moving, but nothing actually happens. The printer homes and gets ready, the bed hits the button a couple times, the display says it's doing Chameleon tool changes and the Chameleon stepper start going, but neither filament moves at all. While the stepper is going I can easily pull the filament in & out, it does not feel like the Chameleon is gripping it at all. So here's a bunch of questions: 1) Is there a picture somewhere showing which hole belongs to which tool? 2) Is the filament in the correct starting position? 3) I've never used Prusa before, I usually use Cura but I don't believe it can support 4 extruders (happy to be corrected on that though?). When I set it up I picked my printer and left everything at default. Then I went to Printer Settings and changed the number of extruders to 4. Although I just now saw the "Single Extruder MM" check box. It is currently unchecked. I'm pretty sure I've loaded the models correctly and assigned them to extruders. 3a) Should I have Single Extruder MM box checked? 3b) Is there anything else I need to do to prepare Prusa? 4) Probably getting ahead of myself, but I left it moving while doing nothing for a few minutes and noticed it paused the printer at one point. Is that always going to happen? I was under the impression that it was an automatic process...