The Spectorcore has been around for awhile and has gotten a lot of praise, fretless is something a person has to get attached to so to speak but you will have the lines to assist unless you have chosen the clean board...but, you will have the markings on the edge (a little secret of mine, I use a silver Sharpe to mark the G and the B (E on the A) locations for added reference on my lineless NS4). The 35" scale is split between the nut and the bridge and in the case of the fretless you will not have the adjustment of frets (except for the lines or side marking). Get it, try it out and then tell us what adjustments you might have to make...it will be fun!