If I am reading this correctly, on your Status you have 3mm clearance over the last fret and 3mm clearance over the 12th fret. Unless it's late enough my math and visualization skills are way fuzzy, that's a dead-straight neck.
I'd ask . . .
On your Status, what's the clearance over the FIRST fret?
And are you sure there's no relief in this neck (the Status) if checked by the usual manner with a capo'd first fret, etc. ?
I've never gotten a used bass that was adjusted properly. And you must remember two things here:
First, there is an intertwining relationship between neck relief, string heights etc., where they can affect each other (get your string height over the last fret correct, then crank in more truss rod tension and the string lower themselves as the neck flattens, or the reverse of this, for instance). And . . . .
Second, not a lot of this applies to graphite-necked instruments ! Even the ones with truss rods are just a different animal.
Thinking this over, I'd think it's buzzing above the fifth fret as the neck is not straight enough yet. You always start with relief, then go to your string heights. The great thing about an ALEMBIC is that we can easily adjust the nut to match the clearance on your Status.
I would certainly NOT start this process until you have installed the strings you plan to keep on this. You are shooting for a low, straight action, and it will be pointless to do this with the strings it came with.
I feel like all basses have a range of adjustment that are unique to each bass: Some will just go lower than others. I don't know if we can match the Status, but it's sure going to be interesting in the trying . . . the best quick course in this is Gary Willis' routine:
http://www.garywillis.com/pages/bass/bassmanual/setupmanual.html J o e y