I've been considering purchase of a Spector Euro LX 5 fretless. Problem is that they are rare and I would have to buy it without playing it. I've played Spector Euro fretted basses and found them to play very well (albeit a little heavy from the neck thru design). Has anyone out there played one? How well does it sustain? How well does it compare to say a Pedulla Hexabuzz fretless? Thanks for any input you can offer.