Yeah, I'm gonna machine the grooves on both plates and also a little bit more out of the base too. Both plates were laser cut (though look a bit rough).
Here's a pic of the autocad drawing (viewed from underneath) I did just for my working out, I've plotted it out 1:1 so I can save time marking out on the plates to machine the paths, pointless doing it on a cnc as I've kept it pretty simple.
Though I may change the infeed to just a straight track