If you've got Netfabb, move the stl to the origin in Netfabb, then use it's measuring tools to work out exactly where the holes are that you want to change. Then use this information in OpenSCAD to difference a couple of cylinders from the stl. Ian -- View this message in context: http://forum.openscad.org/How-do-I-edit-an-imported-STL-file-tp20466p20467.html Sent from the OpenSCAD mailing list archive at Nabble.com.