Do you use charts or do you use formulas for figuring out things?
When looking for things that are in charts or can be figured out by a mathematical formula,
which do you usually do?
For example - I just found a chart that shows what size to cut squares for a finished size D9P.
It confirmed the formula that I (finally) figured out on my own.
I will probably use the formula because it is easier for me to dredge that from my mind than to relocate a chart from somewhere.