Opinions and advice on my sharpness tester idea.

[Blade Banter]

Mr. Blade Banter welcome to the forum.  

Thanks for posting the video with your sharpness tester. It uses the same principle as Mike’s instruments.

From physical point of view we have to measure the force necessary to cut the test medium.

I am wondering about the way how you use the Lyman trigger pull gauge. Your video shows that the pull is oriented rather horizontally and so only small part of this pull acts vertically and contributes to the cutting process.

I would recommend to orient the pull vertically, downwards. Than the reading of the pull weight can be used as a measure of edge sharpness.

Jan

   Great I'll give that a try as the way that I was doing the test seems like a good way initially as I'm trying to keep as many factors the same during the test.  I can see that you brought it up using the upper hole may act as a lever causing the force to be less as it adds leverage when rotating the spinner.  
     I'll give the vertical pull a try to see if there is a difference on the result.  Aslo Ken brought up a good point on measurement in grams other than ounces.

David