Joe, These are the same tabs as on the airtronics 94141 servo. They are used for wing mounting in airplanes. The best and neatest way I have found through the years is cutting them off w/ ***** and then I cut a sanding stick down to the width of the tab... Round the corners so it looks nice a pretty. I do use the dremel when there are chunks of plastic left. 1/2 inch sanding drum fine grit and low power!