Hi @doug, I’ve just read through this thread. I agree with your assessment of the Snapmaker PLA white - it seems very brittle. Anything I’ve made which has a bit of stress on it has broken.
I’ve had much better luck with the 3D Fillies stuff and I suspect we might have got a bad batch from Snapmaker.
My temperature tower of PETG is currently printing well. A bit of stringing at 250 degrees and I expect problems to occur once the extrude temperature drops below 210 degrees. The temperature tower goes down (up?) to 180 but I’ll probably have to stop the print before then.
One of the factors which seems to have improved my prints is the slicing software - I’ve started using Simplify 3D and it really seems to make a difference - especially with the infill and some of the smart thinking around slowing down the print for short paths etc. I’ve been able to raise the print speed to 100 mm/s without any noticeable problems but I’ve been keeping the first layer to 20 mm/s and sometimes even 10 mm/s for small items.
It’s quite a journey!