How can I insure that I can add a fillets this is the main struggle in my line of work and I still have not got a good answer, if I can machine in a fillet I should be able to add a fillet yet every job I struggle with this. so how can I assure this will work every time? we are a die shop and the radius is the last part of the tool that goes in. and since it the last thing how can I assure myself that it will work? I need a 15mm radius around the top and I never have an easy time with this. And I still have not had anyone explain why.