Ferrari keychain, requires AMS, for a better finish use a PEI bed. There are five colors, requiring two color changes in the AMS on layers one and two. If you use my profile, you must specify that the yellow and red are in the same AMS position when sending it to print, and place the black, red, white, and green colors in the AMS. In the first layer, when it finishes printing the red and changes to green, we replace the red spool with the yellow one, and in the second layer, when it finishes printing the yellow and changes to green, we replace the yellow spool with the red one and let it finish printing the entire keychain