Do your layout on a piece of stout paper, even sans dimensions, you can see what goes where and why as well as physically put it where it goes and visually see if it will work or not. I have had good results using Brass shim stock, but in a pinch, the flat side of a plastic gallon milk jug (way cheaper and easier to cut) makes a durable and transferable template too. I got in the habit of using shimstock as a Boilermaker on time consuming pipe development layouts as an example, 14 sections, 105 degree elbow using 16" sched. 60 pipe. It was a as needed assignment, so when I was tasked with the second one, a year later, I went to where I stashed the paper cut out patterns and they were unusable from poor storage. So I restarted from scratch, but cut out the layouts in .025 shim and although I don't work there anymore, those layouts may very well be hanging in some US Steel,
tool room today. Sheesh, that was 1974, I'm getting old.
