Cube 3D printer community

 Seriously, I have two different genuine Cubify PLA Filament cartridges sitting here that repeatedly break off during normal print attempts.  The filament and protecting tube did not bind (the broken filament continued to slide easily in/out of the magazine after the print jobs aborted).
They are very clean, shiny right-angle breaks, indicating low-temp stress fractures during manufacturing or loading onto the bobbin.  Cubify filament is quite brittle, and this pre-stress leaves it susceptible to breakage even when being handled gently.  Their process appears to fracture 75% or more of the total material thickness, which often fractures the rest of the way during unwinding or on its trip through the tube between the cartridge and the print-head.

 Also, the black rubber "protector" surrounding the print head either catches on the glass plate or the object being printed (rolling up into a mess or striking/breaking the printed object loose from the plate), or it backs-up and fills with filament, which clogs everything up, which must then be removed and tediously cleaned out.  I find it best just to remove the black rubber "protector" all-together so it no longer interferes with printing.

 Also, printing with ABS is impossible.  The workpiece bows, warps, and deforms on the plate, looking nothing like the object it was supposed to be.  An object shaped like a hocky-puck comes out looking like a saggy tennis ball left in a hi-temp oven too long...

 Last night was the first successful print run I've been able to make in over 6-months.  It was done with after-market filament, with the back rubber print-head protector removed.
I'd would not mind using Cubify filament, but thus far, it has been the primary source of my 3D print problems, so I'm forced to use an alternative for now...

ron