Perfect fit - darn it!

I’m working on a new project. I start with the box and then put things in it and wire them together. My usual approach is to run a 5 hour print for the entire case and then find that some of the holes in it are the wrong size. So today I thought I’d do it properly. I printed out a tiny test print instead. Of course, when I do it this way round the holes are exactly the right size.