Well, there is a meter to measure drawbar pull. This could be used to get a more objective reading on how much improvement there really is. I would like to see numbers to compare: an unaltered car, one with replaced wheelsets, one with eyelets and Flyer wheelsets, one with eyelets and replacement wheelsets, one with eyelets and pointy axles and one with eyelets and SHS needle point wheelsets. And if possible, one with Delrin inserted into the eyelets and pointy axles and repeat with SHS needle point wheelsets.
Probably asking too much…
Digital Meter Measures the Drawbar Pull That Your Locomotives Develop
Helps you maximize the performance of your locomotive fleet
Simply hook the wire to your locomotive's coupler, press the ON button, and turn up the power. Our digital meter displays the pulling force developed by your locomotive in ounces. Add weight to your loco and see how the pull increases. Pull a train with the meter to determine how many cars can be pulled per ounce, then assign your locomotives to pull a train just like a real railroad does. Capacity: 176 ounces. Readability: 0.1 ounce increments. Includes automatic battery-saving shut-off (90-second), and instructions for use. For all scales of model trains. (Color may vary.)