Patrick,

That should be a piece of cake. Mere minutes after a tool bit is cut, but we probably have one.

You really should probably scribe exactly where you want the new groove(s) though, or sketch it out, because 1/5" of an inch is an odd description. I'm assuming that to be .200" - right? We'd set up the digital read-out to move exactly how far to do it. Also be sure to dimension things as the edge of one groove to the edge of the other.