I used the factory edge of the half-panel of hardboard as a guide for cutting the ply. I wanted to cut a 5-1/2" strip, and my saw cuts 4-1/2" from the edge of the shoe, so I wanted the edge of the hardboard 10" from the edge of the ply. So I set my combination square to 10", and used it to mechanically set the distance. Hint - if you need two things to be precisely the same length, try to avoid measuring them separately. Use some mechanical mechanism for setting the distance.
It might not be the easiest project in this list, but if you already have some experience with wood cutting and joinery, it won’t be any hassle at all. Thanks to the extremely detailed instructions it shouldn’t really be a problem even if you’re not very familiar with woodworking. This could actually be a great project for refining your woodworking skills as a beginner!
I had a similar experience with running electrical power to a shed. It turned out that I could build a 12x12 shed without a building permit as long as I did not run utilities, but getting a permit opened a whole new set of requirements that forbid me from having a shed at all. And when the nosey old woman next to me kept calling the building inspector on me, it was suggested that I could run an extension cord out to the shed anytime I wanted as long as it wasn’t fastened in a permanent manner.