Printed on my CR-10 in the stock white PLA it came with, The print came out really well but there was some minor lifting on the filament hook. Doesn't affect it's functionality. It was very fidly for me to fit on, I wasn't sure if I was removing the two screws or not or simply sliding it over them. I opted for the latter. It would be nice if it fitted snugly with the stepper cover upgrade, The two together don't fit so well.