How many times do we need material of a certain size, especially to test a concept? It would be wasteful to take a fresh sheet but is that scrap close a bit big or close a bit small?
Now I have had a measuring square for some time now by moving the material to the lowest possible point and the farthest right point and then making a horizontal cut line as long as possible as close to the top edge as possible, and a similar vertical line on the left.
When this is done you have a piece as large as you can make and a ācarpenterās squareā that is the scrap. With a pro you can put the design on a 30-degree angle and engrave the whole length, while with a basic or plus you cannot engrave all of it. I have posted this set of rulers before, but as I cannot post the two cuts mentioned above (you have to play with it yourself to get it right) I can repost the accurate scale to engrave (I just chose to engrave the inches but you can choose either or both). I also engraved some clear acrylic as a ruler to use as shown below. (The green line can be cut first and make finding the 30-degree angle easier. 
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With a bit of double-sided tape, I fit the angle to the lid. It will easily come off if needed but it will not slide off when the lid is opened (and will keep other stuff from sliding off).
I took photos of two situationsā¦
I am looking for a 5x5inch piece, but as you can see have a bit over 4-1/2" 
So maybe I can just squeeze it out of a more complex piece 
No joy here either. However, even though I spent 6 hours, I fixed a photography lamp that was broken, organized a number of tools needed to fix the lamp, and found my bucket of tiny screws that became disorganized several years ago when the 25 trays they were organized in fell out all at once and cursed the manufacturer for using such tiny screws put in so loosely that they just fell out to āwho knows whereā so my 2mm screws looked like lag bolts but managed to work.
Perhaps tomorrow I will find a proper sized piece of scrap.
