https://forums.autodesk.com/t5/machining-discussions-forum/drilling-aluminum-full-or-partial-retract/m-p/6098768#M4484 <BLOCKQUOTE><TABLE border="1"><TBODY><TR><TH>Laurens-3DTechDraw wrote:</TH></TR><TR><TD><BR />Tapping in a different machine then where the holes were drilled is tricky one. Make sure you really measure it out well. If the tap is just a little off the holes centre you might be breaking them like matchsticks.<BR /></TD></TR></TBODY></TABLE></BLOCKQUOTE><BR /><BR />The Haas has a nice electronic probe, so I should be able to get the fixture plate positioned accurately.&nbsp; Sat, 31 Oct 2015 16:16:05 GMT SGoldthwaite 2015-10-31T16:16:05Z