Apparently not, although I have the correct tools and bushings for trimming the face of the barrel extension, once I have it close, like .003 or .004 I use a file to finish it as it gives a much smoother finish than the tool....(snip).... a few turns with light pressure to smooth it out as mush as possible with cutter, then make a few passes with a fine tooth file that has the edges safed (teeth ground off) to get it nice and smooth. You must hold and stroke the face of the file dead flat on the case of extension.
Thank you again for your knowledge and experience here on the forum. We do not thank you enough I know.