needed a tracer for writing out legible IP addresses for a sign I found this one from 2024 and remixed in the period tracer if you need to scale it just scale in X and Y so it doesn't take forever to print. 

In picture the small one is the original size really only good for using fine mechanical pencils and the big one is scaled in x and y 400%

the ruler is this one i found here https://www.printables.com/model/1677-ruler-15cm