I was a machinist for 10 years. I wasn't trying to lecture you or anything. Most folks don't have access to a surface grinder, and it made me curious. Later, Roger in VA.
That's what the old westcoast fallers used back in the sixty's. Finding one may be a problem. If so, just make one. All they are is a cam handle with a spring on the back side for quick release and 2 bar rails with a roller on both ends.
Bernie