I meant blank fretboard as in no inlays in it anywhere already, slotted yes.
I wouldnt take my chance at routing an inlay myself, It would definately scare me too much on messing up, esp since I would like to do Maple, and i heard you can't fill it easily
Another query I had though, Lets say on an Ebony fretboard, normal dot inlays, Would it be possible to cover all the dots, and then inlay something in the 12th fret spot, maybe 11-13, by only removing those 2 frets? Do people do that; Take out 2 frets to inlay one spot, so you dont have to refret the whole guitar?