Chris, We think alike in the approach to this question. Especially the removal of as many variables as possible in the testing. I use the Lyman scale as well and the only way in a bench static pull that I found to be consistant was to bring the scale down 45 degrees from the plane of the slide and pull. This way the roller would stay in the proper position and not ride up as noted in your first post. I found that my mean deviation in a series of 10 pull test was normally held to 4 ounces or less. I am interested in your wooden finger and want to see a famous "Chris Pic".