Thank you for your answer 🙂 My experience in robotics tells me that it is not about mechanical inaccuracies. Mechanical inaccuracies will give you a bad first layer (with all the consequences), but not more. The dimension is given by the steps of the motor, diameter of the wheel (number of teeth) or the lead screw pitch. These are accurately machined parts. I'm sure the printer is much more accurate than what it prints. If you make a 10mm part and it is 10.2 you cannot assume a 0.2 mm inaccuracy in 1cm of belt (actually drive wheel). The only real mechanical problem with the printer is the filament drive mechanism with loooong tubes, but this also cannot explain all the errors. Probably the only problem is the fact that the Cura configuration files are not refined as they should be. The whole printer gives you the impression of a ready to use, push-one-button tool. You have a huge display that shows NO technical details while printing (this is really frustrating), there are long periods of time for "preparing" or other operations while you don't know what happens or if anything happens at all or you should simply restart the thing... You would expect everything is then refined to the last detail, you just press "print" in Cura and it works. Well, no! You have to tune a lot, it doesn't simply work. Again you would expect that from a DIY toy, like Prusa, but not from a "professional" printer. For what I paid I should have this work already done by someone else for me and I should not have to waste days of my time to finish someone else's work.