Think when I was trying to get one I was shooting between 5-6. I don't know the difference in models. 7 shipped seems ok with a recent retune and trip to the tech
The only major difference I know if is that some have the graphic EQ, some don't.
To note I am a notorious cheap ass
Says the dude who owns like eight basses, including two Rickenbackers.
So how do you dial yours in Sartori? Max the channel volume then adjust the master volume to taste?
See, that's the thing. I do use the graphic whenever I'm playing metal.
Current Catapult settings (which are basically the same as the 5th Child settings and what I used on the Fathomless album):
Channel 2 input (channel 1 is for guitar)
Volume 2 - 5 (except for the beginning half of "Servitude," where I push it up to 6)
Mids - 10 (always)
Bass - 4, occasionally 5
Treble - 2
Master - Usually about 8.5 to 9.5... was around 9.5 at the desert show... like I said, tiny adjustments between 7.5 and 9.5 do a lot
Then on the graphic, basically a frowny face (the goal is to do about the same thing that turning the mids all the way up on an actually boostable EQ would do):
40hz - flat
100hz - boosted halfway or just over halfway
250hz - all the way up
625hz - all the way up
1560hz - halfway up or a little less
3900hz - flat or just slightly below flat (with new strings)
For the folk/rock band I generally just turn the graphic EQ off, then turn down the treble knob to 1. Usually the master is a bit lower, too, lol.