I may be mistaken, but it looks like the Mosquito Hot End is really intended for a bourden drive printer. I emailed these guys and learned that they couldn't mount their really slick heat-sink setup on the M2 because the filament drive was in the way. So they left it off. My question then would be "...

It's pretty nice Dave,
Does your heater have a thermostat? You mentioned a thermometer? What temperature have you found to be best for printing ABS?
best,
john

Hi Makeal,
What do you interpret in your prints as symptom of not-enough cooling? I feel I get close to perfect prints with my stock M2, the glass plate, tape, glue-sitck, and Esun PLA, using Simplify3d 4.0 with settings I'll share with you if you'd like.

Hi Karl,
3/4 inch seems pretty substantial. Is this a thermal consideration? I stabilized the 1/8 inch aluminum bed on my TinyBoy by gluing 1/8 inch cork drawer liner under the heater element - or at least I think I did - it does work.

What are you using Nylon for?

If it is an ANSI threaded screw (this one isn't) and number 10 or smaller, I can usually shear it off pretty cleanly with my stripper/ crimping tool. If it's Metric (this one is) I grab it in a vise and using a cut-off wheel in a hand grinder (Dremel tool) cut off the portion that makes it too long....

https://softsolder.files.wordpress.com/2018/02/img_20180205_093112-m2-nozzle-silicone-applied.jpg?w=420 Looks hideous, works fine … Ed, Is this the nozzle you currently use? I ask because I agree that it isn't pretty. On the other hand, I run things which worked from the start and which I'd planned...

Thanks guys. I'll try what you suggest and let you know.

I seem to be getting this problem on most of my PETG prints. I'm using E-Sun "natural" THe PETG settings recommended at this site, 247C Extruder, 87C Bed, and in this case 100% cooling on from second layer. I get these inclusions of burned filament every so often. See photos. What do you think is ca...

it would be good to know what filament. and whose?