The callowhill is definitely not on hold. Tim is working on the body right now. I opted not to go with the pearl white metallic finish and more of an alpine white. with a brown tort guard. The bass will be awesome... and it will have a Lakland p-pickup.
I'm going to wait on that bass before I order another Callowhill, but it will be a 5 string.
As for a "back up" to my fretless DJ, here's what I'm thinking
Fretless DJ4
Trans-Brown Mahogany body
acrylic coated Maple board with ebony dots and lines
Single-coil Chi-Sonics
White Pickguard
Passive
A nice compliment I would think. My current DJ would be with flats and that with ss or nickel rounds. A good 1-2 combo. Though, that would be after getting a five-string and my p-bass, which is why I say a year or two.
We'll see where everything winds up. It doesn't look like money will be available for me for a while... I'll have some more flexibility whenever my fretted DJ comes in. Past my fretless and fretted DJs, everything else is a luxury anyway.