Bill, Thanks so much It all makes sense now. I will get to it and see where the new adventure leads. :-) Abdy

I don't have a 3D Chameleon motor wire or a direct drive extrudder. Do I have an A axis? The Chameleon extruder is plugged the E control wire from the Ender 3. The other, the selector, is plugged into the Chameleon control box as is the switch I assume the selector works using the short clicks to pick 0-3 fillament and the E motor drives the filament to the hot end I did it like at around 39:10 in the video. I use the stock Ender E wire and the Chameleon selector wire: https://www.youtube.com/watch?v=GaWiYqWP_s4&list=PLs1jpNL7rg78Bm6cDAC4JwaUNlpFa6UEf so just G0 E250; G0 E50; Switch to correct filament then G0 400; Or whatever to get to the hotend? Andy

Bill, Since the video suggests I use the E motor control to drive the Mk2 I need to use that for Gcode. So I would change the sequence in the generated code from: G0 X3 Y3 F2000 ; press the button G4 P5500 ; dwell for 3 seconds ​ G0 X-3 Y-3 ; back off the button ​ G0 X3 Y3 F2000 ; press the button ​ ​ G4 S10 ; << ------- THIS IS THE SAME TIME AS WE RETRACTED IT FROM ABOVE... THEY MUST MATCH... 10 SECONDS IS THE DEFAULT To: G1 E250; Andy