I have firmware 2.00 which I believe is the original one, I made a spool holder. I have your run of the mill china pla filament 1kg 1.75mm, cube is apparently 1.60mm I can't tell the difference neither can the machine.

I made an adapter that allows me to install the cube tube into the adapter and the filament sits on the table beside the machine feeding the filament thru the adapter into the cube tube and into the machine.

Basically what happens is as long as the cartridge is connected to the machine it says there is not enough left but we both know there is like 2000 feet on a spool of the aftermarket stuff you just override the not enough filament left warning and print.

I think if I upgrade to the newer firmware they fixed this glitch which I don't want to have to buy the cube filament but I also would like the better quality prints they claim the new firmware gives.

I printed 2 small 8 min parts and a 50 min tree frog it didn't stop working but I don't think it was running long enough