Thanks for the varied input guys. I passed this one onto our reseller and went the old-fashioned way by creating mirrored geometry ahead of time. Hopefully this bug will be fixed in the next release of MasterCAM.

I'm running Mill 9 level 3 and trying to do some mirroring on a few LH-RH parts. The desired cutting method for my situation is a parallel-finish. It works great in original position, but after mirroring it always generates the toolpath in a conventional direction of cut. Even after clicking 'Reverse Toolpath' it still comes out conventional so I hope to get some better input from you guys. Thanking you in advance, have a good one.