I'm trying to setup my son's Ibanez SG400 factory fretless and am finding it a bit tricky. We bought it used and the prior owner had someone adjust it. The bridge saddles were pulled nearly all the way to the rear with an odd pattern. I put it on a good digital tuner and found all strings slightly 2-4 cents sharp at the 12th fret but the harmonic pinged at 12 was dead on. I measured the string length from nut to saddle on his other Ibanez fretted bass. I also see a common pattern with the D&G string saddles slightly toward the neck compaired to the E&A. This bridge pattern is similar on his Fender P-bass as well. Using the fretted same scale Ibanez as a guide I moved all saddles up to the same string length duplicated the pattern and rechecked the intonation. Moving all saddles up 1/4+ inch there was no change in tuning. Still sharp and the harmonic dead on. I tried adjusting the saddles back again with no change. His teacher told him you don't need to worry about the bridge with a fretless, you compensate by ear. I wonder about that comment.