I learned to play fretless on a beautiful Westone Thunder III Mk2 which was totally unlined and had the side markers where the appropriate frets would be. I played many gigs with this strung both EADG and BEAD,
Later I had a Yamaha TRB1005 Fretless which was both 35" scale and lined, with dots between fretmarkers, as mentioned above.
I found both the lines *and* the scale offputting.
The extra inch(!) may not seem much, but I found it was just enough to make me have to concentrate on the intonation over the music, and I also found the placement of the side dots a distraction. All this contrived to convince me to part with what was otherwise a wonderful instrument. I believe the current owner is very happy with it.
I may also say that the Westone Thunder III was also a magnificent bass, being a one-piece body and with a beautiful ebony fingerboard - don't confuse these with Thunder 1's, they are a quantum leap in quality.
The electrics were amazing too, with a single active tone knob and a passive treble cut. It also had a series/parallel switch and was active/passive. Certainly one of the best basses I ever laid hands on. If it had been a 5 string, I'd never have parted with it.
I now have a wonderful (but inexpensive) 34" scale Yamaha BBGN modded with Yammy RBX375 humbucking double pole pickups and The Bass Doc stripped off the fretboard and replaced it with a magnificent unmarked ebony fingerboard with the side dots in the 'correct' positions. A truly beautiful job and a lovely instrument for me to play. Thanks Howard.
Being the scale that suits my muscle memory, and having the side dots where I prefer them, I find I am very comfortable playing this bass.
G.