So I used the coticule.be site caculation chart, but had a question on measuring. When you measure the blade are do you measure from the top of the spine to the blade edge or to up the blade too where the spine starts?
This is the first time I have measured and on an old Greaves smiling wedge that difference makes the difference between 1 and 4 pieces of tape on the spine. My guess from the pic with the caliper measuring the blade was up too where the spine starts.

Thanks