Thank you, these worked perfectly on the first print. I removed the thumbscrews from the build plate and using a flat blade screwdriver and small hammer I tapped the thumbscrews into them and put them back on. My left front leveler was too hard to turn. Not anymore. It makes the leveling a lot easier, and I can fine tune the print while it's running with them. Thanks, you just saved me at least $50 in failed prints.