Newfsmith, I live in Wayland, MA and will remove your lock ring if you like. I have the puller, a bench vise, and a 12 inch crescent wrench and haven't yet met a cassette or freewheel I couldn't remove (but of course there's a first time for everything). No torque wrench though, so I can't measure 40 Nm for the re-install. I build wheels too, but haven't been a professional bike mechanic for 30 years.