In - and Out- Diameter Measuring Tool

Hi everyone, This is my first post, so please excuse any mistakes. I was searching for a tool like this on MakerWorld and other sites but couldn’t find one that matched my design. Measuring the outer diameter of certain pieces can be tricky, so I came up with this tool that allows for both inner and outer diameter measurements. Tool dimensions: 75mm × 120mm Outer diameter measurement range: 5mm to 20mm Inner diameter measurement range: 2mm to 21mm Additional feature: A rectangular hole (2mm × 100mm) in the middle of the tool, allowing you to draw a straight 10cm (100mm) line. Now, here’s the issue: I'm using a Bambu Lab X1C Combo, but I’ve noticed that the holes in my prints are not perfectly round or precise. This is quite frustrating, especially considering the price of the printer. I was expecting better accuracy. Has anyone else experienced this? Any advice on how to improve hole precision? I’d really appreciate any tips! More projects are coming, so stay tuned! For improved versio