The AW3D HDx has exceptional acceleration, speed, and print accuracy, better than that of the AW3D HD model. Just ordered a AW3D HD last month with JRX Hot end and was wondering how did you make this model faster and more accurate. You also have a finer Z rod but still written with a Z resolution of .06 mm. (layer height). Can you provide more detailed information on what has changed from HD to HDz also can these changes be made to the HD