Ok get this. Want the tonal capabilities of a fretted and fretless but dont have the buckaroonies to have both. I just came up with this great idea! A neck that the fret wire slides out from a locked position in the slots, and then another set of fret wire that looks like wood veneer and doesn't protrude from the fretboard at all so you you have fretted and fretless! And, it comes with a special tool to remove the wire! So you can go from fretted to fretless in minutes! Minutes I tell you!!!! This is great! Has it ever been done? If not, should I patent this idea?! Its amazing what you can think of while having a bowel movement!