Dave - That sounds like a great idea!
Mark - I also prefer the look of an unlined fretless, and my intonation is coming back the more I play the unlined Carvin I think. The thickness of the neck is a big thing for me as well.
I'm eager to see if anything pops up on ebay prior to me sending the bass off for the operation. And of course my brother, current owner of the Carvin fretless, has been making noises that make me suspect he'd like to part with it. He never plays it and has a Steinberger upright that he does play. Ultimately, though, I think for my budget either getting the Lakland neck-swap or just getting another Lakland are the best answers unless I find a deal I just can't pass up. I really like that bass a great deal.
Wolf - what bass did you play on that tune?
James (Malthumb), what did you like and/or dislike about the Lakland 55-02?
John