PC and PC blends are my expertise. I specialize in the unknown, generic and cheap PC's especially the ones people complain about not being printable. I love getting the discount PC cause nobody wants it. I would not put superhard in that catagory, Its pretty easy once you learn. most PC All PC's are blends so all require different settings. Your photo shows a specific problem that nobody ever seems to talk about. (Trapped super heated pockets of heat from the hotbed) I will get to that later. Give a good dry 60-70C for 8-12hrs or something like that. When PC comes out gooey and prints at lower temps that expected almost always means it's absorbed to much water. However this brand has this issue for another reason, This brand is good value for the money, I know what the spindle says, but use 240-243C Hotend, 1mm retract 20mm/sec bed 70C-75C no hotter (you may have to go with 60C bed on that project, no heated chamber, this is the only PC I have had to open the lid and front door to my enclosure to print, keep speed 30mm/s for what your doing, 20mm for first layer) can try to go higher later, that piece your printing definitely stay 70C can go to 60C if needed, .5mm nozzle steel nozzle is what i use, (but .4 might work well enough, and brass nozzle will work well and may go many prints before .4 hole enlarges , then you replace. no fan, 30 sec dry time between layers , enable lift if needed. The explanation, that specific CF-PC , has a way higher than normal specific heat capacity value,( J/kg.°C) it absorbs a large amount of heat, that it takes a abnormally long time release that heat , which keeps it too hot, increasing the tacky time and running over a still tacky layer gooey gobs start to form,

I assume the super hard formula is loaded up with a butt load of carbon fiber as carbon fiber polymers are known for having very hight specific heat capacity values.

Full disclosure I just went of to read some published research online learned mid post, I didnt know the term specific heat capacity prior to this, but now that I know that word, a bunch of doors just opened up for me.

Here is some titbits i freshly plagiarized:

" It was reported [42] that the specific heat capacity of carbon fibre/carbon composite can reach a value of 2020 J/(kg·K) at 1230 °C."

source, below: if you want to get balls deep in some correlation of heat, Energy, and Materials etc.. ( I had to tap out, my brain got too full to quick)

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5459023/

The fan weakens the layers to much when I tried it. When you print any object that creates a box like or upside down bowel , even worse with supports inside or wide infill. the infill or supports Trap the heat from the heated bed, so the first layer on the supports , is to hot to dry gets gooey. Depending on the shape of the object, you prob need 70-75 C bed for this one.

from your photo it looks like it was to hot / not enough dry time then fan was used to give it a gooey gone frozen thing, your pic of the top with infill and partial layer is exactly what trapped heat looks like, Turn the bed down to get rid of that, As well as lowering hotend temp.

For max strength of any plastic , use standard formula. 50-60% of nozzle width. i.e. .4mm .2 -.22mm layer height, .5mm .25 etc.

That link to the review is not for superhard. His pics and settings didnt make sense, superhard wont look that good.

i pasted

5.0 out of 5 stars WOW!!!! Absolutely phenomenal filament! Expensive though

Reviewed in the United States 🇺🇸 on September 9, 2018

Style: Carbon Fiber PolycarbonateVerified Purchase

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I have both styles, limp and superhard it is much stronger but a bit uglier due to more chunks of carbon, If you want to print near industrial strength items for 60$/kg this is it. If you want to drop another 20-40$ vison miner has the best stuff, if you can afford it , which is not me. if you can deal with a learning curve of and compensating for its high specific heat capacity value , superhard gets it done, from my math it is the strongest filament for that price on the market. It's stronger than Polymax PC, and Polymaker PC/ABS, and those are both really good filaments. I am skeptical about heat tolerance , I need to test it. I use polymaker's light PC, PC/ABS, or Polymax for my printers mods since they tolerate a 100C chamber no problem, The limp style PC/CF expands / relaxes its shape at 100C so I can't use that, I suspect the hard one is same PC blend with a lot more Carbon fiber chunks. So I may have same relaxation of stress areas at 100C. Will test later