Stu Miller's Dynamic Spine Calculator asks the user for the "strike plate position". How do I measure and add it correctly to the calculator?
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2 Answers
How to measure the strike plate position for the purposes of this calculation is given in the instructions for the calculator: 
answered Jan 30, 2017 at 15:22
ShemSeger has a great explanation.
If we zoom into the graphic you can see where the measurement is made:
From blue line to blue line.
