So I converted my bench top mill to cnc and I got everything working. Heres the issue, I have mastercam 9.1 but cant find the post to make it work with GRBL. I downloaded fusion 360 and that works but I know how to use mastercam 9.1 pretty damn well and not so much the fusion software. I also have many many MANY files already written in mastercam from years ago that I would rather not have to redo in fusion. Does anyone anywhere know where I can find the post to make this work? The re-seller has nothing for me, and master cam corporate couldn't help. Yes I know 9.1 is pretty old, however it still work pretty well for me. Thanks for any help any can offer.