[oh'mike]

A picture would help.

A router and guide board could be used for most of the cut----then a Multi-Tool to finish off the part that the router missed----

A chisel and a steady hand could be used to finish the router cut also---Mike---

 

[1910NE]

Google the Rockwell multi saw. My brother has one of these, and it's a slick way to make some of those close, fine cuts.

 

[USNavychief]

Any Multi tool will do a great job. I use one each and every time installing flooring to trim door jams back, i tis quick and easy and makes a nice cut. Should work good.

 

[design_lover13]

Do you have a picture?