I recently bought a second-hand lulzbot mini 1.0.4. I’m loving it so far, I did have one question. The previous owner gave me two tool heads that both look exactly like: https://www.lulzbot.com/store/tool-heads/lulzbot-mini-single-extruder-tool-head-v2_1
However, he said one was a 1.75mm head, and another was a 3mm. The 1.75 mm head needs some hotend work (thermistor broken) however, I don’t seem to see anywhere that lulzbot officially made a v2.1 tool head for 1.75. Everything appears identical (I haven’t torn apart the hotend yet to see if any diameter changes)
The only difference I noticed besides the nozzle was the 1.75 has some ptfe tubing right after the extruder gear and into the hot end.
Was there ever an official v2.1 extruder produced from lulzbot for 1.75?
Reason I ask was I was thinking of replacing the hotend with a E3DV6 and a small nozzle with a dii cooler to use as my miniatures print head, and keep the 3mm .5 nozzle for making structural parts. However, if the v2.1 was never really designed for 1.75 not sure if its worth it and should just wait until I have the money to upgrade to the mosquito.
I also have not tried running the 3mm with a smaller nozzle over longer periods for miniatures to see if the extruder can handle the pressure over time etc.