Good idea on the old pattern.You start looking at paper in a whole new way and find yourself firing everything from baking paper to notepads down your barrel.
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I hear some paper can have clay in it so lubing is a good idea.
For my patches (2 wraps) pattern I converted every thing to metric, PIxD+PI(D+2(paper thickness))-0.25mm to allow for the paper bending up onto the 2nd wrap. About this time I was thinking I was a fancypants mathmagician when I got slapped down with the big ol variable that paper stretches when it gets wet. Doh! Got there in the end by rolling a ribbon of paper twice and measuring the required length.
With the 45/70 printer paper works ok so made up a pattern and print out a sheet of them at a time![]()
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