Have you seen kerfing saws / planes? If not, take a look at those and see if you think they would work for you
@Dr Al has a nice example on his website CGTK - Kerfing Saw
Although he won't be needing it now he's bought his big bandsaw![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
@Dr Al has a nice example on his website CGTK - Kerfing Saw
Although he won't be needing it now he's bought his big bandsaw