Just got my Kala SUB 5-string off the wall - haven't used it for ages, not since the original tune-up session, as many circumstances changed. All tuned up again. That Batking does look tempting - I prefer fretless for rubber-string basses. Used to have fun with the ceilidh band, taking an EUB (NS WAV-4), Warwick Thumb fretless, and an Ashbory along to gigs, and swapping between them as the fancy took me.