I am getting constant clogs and I'm not sure what to try next. I'm used to running a direct-drive hotend, and this bowden tube assembly is unfamiliar to me.
In Stage 6 Step 9 the instructions say "Fix two PC4-M6 couplings onto the heatsink of the switching hotend." Also it says "If you have a low temp side, make sure that the PTFE tube has been pushed all the way to the nozzle. If not, the hotend will get clogged! It should slide approximately 65mm from the top of the coupling." This isn't making sense to me. Does the PTFE tube somehow fit differently in a low-temp hotend as opposed to the high-temp version?
I didn't find any PC4-M6 couplers in my kit, so I procured my own. The M6 thread on the coupler does screw into the hotend as expected, but the bottom end of that fitting is WAY too small for the PTFE to push in through it. I tried drilling this out to 4mm, and now I can push approximately 65 mm of PTFE below the top of the PC4-M6 coupler. Unfortunately, this didn't stop the clogging.
It may be that I'm misunderstanding something very basic here. Can anyone give suggestions on what to try to stop the clogging? It's been a fair amount of work putting this on my printer and I sure don't want to give up on it now.