Just found one...... http://www.mitutoyo.co.uk/MitProd/mt...1!Opendocument but taking a cut in material is also an option I have in the past input the size around nominal knowing the cutter is bigger so dependant what you are doing eg inside slot or outside it would leave metal on the component all over. Then check how bit it all is and adjust the offset accordingly. It means you get a good component first time.

Ant