Calipers and center finding tool

I highly recommend you use PLA basic, it seams that PETG is causing the sliding parts to not move very easy. Very important to make sure that you remove all support material and use 180 grit sand paper if necessary. It needs to be broke-in when you put together the sliding parts, back and forth about 10 times and then it will move freely. This center finder makes finding the center easy, fast and accurate. In addition you get inside and outside calipers giving you a two-in-one tool. If your looking for calipers that have 0.01mm accuracy, this would be the wrong tool, but 0.5mm is achievable. The center finder is dead on and very easy to use. I have provided two profiles for your convenience, one using the 0.4mm nozzle (takes about 3 hours to print) and the other using a 0.2mm nozzle (takes about 12 hours to print). The 0.2mm nozzle will give you the best overall look with markings and numbers that have a cleaner and easy to read for better accuracy. If you only want to use the center f