I don't get the whole 'can't live without my 5er' mentality really. I don't see a 33 1/4'' instrument as the best candidate for a 5er anyway. Rather I would have something made custom, or modify something, with pickups in the 4003's locations. I think Jeff does the work justice, as they don't seem rough conversions in any way. I don't think the work adds any value to the instruments, as it is still a garden shed chop at the end of the day. He is trying to sell this thing for list price, whereas I think such mods easily lop 1/3 of the price, purely because they weren't performed by a renowned luthier.
I also wonder if he is stuck in the rut of modding every Rick bass blindly, just to say he made a 5er conversion out of a Laredo, or whatever. Perhaps I'm being too cynical, but those walnut basses have only been out a year or so. Seems odd to buy one, decide to instantly perform non-reversible mods, then chuck it up on Ebay at list price, presumably making a minor loss for the cost of the new nut, bridge saddles and tuner.