http://youtu.be/SltR2k4WDi4 protractor
The drawing board allows you to place anything that will fit and can be traced, it also is very accurate as if there are circles or drill holes you can correct the trace by
telling the trace output to correct to the value you want. that worked for me when I copied a ford engine gasket and defined the bolt holes to what I measured off
the original.
I have always made my own diagrams well now I can get them into a digital format
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