Hello, I just ordered a 3d chameleon and I'm trying to make sure I've got everything ready. Just want to make sure it will work with my extruder on my original ender 3. I'm wanting to have the y adapter prior to the extruder. Redrex Dual Gear Ender 3 Extruder... https://www.amazon.com/dp/B09ZDQM6P6?ref=ppx_pop_mob_ap_share
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You'll need to print a PTFE adapter to couple the Y adapter to that extruder. If you haven't ordered it yet, the much better option is the BMG Clone... it's way more reliable than that design and already has the necessary connectors in it. (That old red dual drive from Creality has a fatal flaw that will destory it self after a period of use.) This is the one I use: https://www.amazon.com/3Dman-Extruder-Universal-Extruders-Transparent/dp/B09MY98TKZ
Bill