This is one of my favorite models of all the catalogue. I printed it with two different materials, one with PLA Black and other with PLA+ Silver. I used the keychain file for both versions at 100% scale. I liked how they came out with both materials. I think it's an awesome model and I did not encountered any issues while printing it, other than a bit of stringing in the horns. Printer used: Ender 3 V2 Neo. Slicer settings: in GCode file. Challenges encountered during printing: Just some stringing, other than that the model is well designed and prints well.