Hello, Thanks, everybody, for so much useful information. I recently lost my mind and bought an Adler 105-27 and am curious about what the 27 sub-designation means. I have searched fairly thoroughly and can't find a reference on the web, including on Adler's parts blog or in the old 105 manual. I'm not familiar enough with the 105s to discern any unusual features. Thanks for any information you might have on the -27 or 105s in general. Gary