Okay so we spent 3 days tracking with the Streamliner 900, and it was about the easiest time I've ever had dailing in for studio work.
I usually use a slightly more complicated setup in the studio, here's how we set up this time:
Lakland 44-02 (in passive mode, blend set 75/25 bridge / neck, coil tap in center position) to Summit Audio TD-100, balanced DI out to mixing board, 1/4 out to Streamliner, streamliner DI (post-EQ) out to mixing board.
When we first started getting sound tests, the engineer said "Holy sh** man, turn the bass down!!" .... he looked a little puzzled when he saw the bass knob was already a little left of flat!!
For my main sound, I set the amp as follows; gain switch on, gain knob at noon, bass at 11 oclock, mid at 10 oclock, mid switch at 600. treble flat. We set the gain so as to give a good amount of fur, just before it begins to actually break up. After a few tests, we decided to put a Daking FET II compressor in front of the amp to give a more even and controlled overdrive characteristic than my right hand technique normally affords me lol

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We got a nice thick tone going, and did some tests with just my signal and the drums... did some EQ'ing on the kick drum track and BAM!! We were home. Perfectly smooth, slightly gritty tone that punched straight through the guitar mix like a load of buckshot through cardboard.
For our one kinda "progressive" sounding track, I do this extended 4 measure run with just drums accompanying and I wanted a different sound for this section. I've always found that, at least for metal, what sounds great on bass solo usually sounds muffled and lost in the guitar mix... so for this section I set the bass knob back to center, switched the mid selector to 2.5 to cut out some finger noise, and cut the treble knob down to 9 oclock. I also switched the Lakland's coil tap to the far bridge position, and solo'ed the bridge pup. This gave me an AWESOME Jaco sorta tone, with a little more grit and personality. I LOVE the treble control on this amp... boosting adds nothing but that sweet shimmer that can almost be more appreciated "in the mix", and cutting it doesnt take any of the upper midrange out... as others have said this is an extremely well voiced control and it reminds me of the much more expensive EBS TD650.
Should have soundclips for you in the next few days!!
Really excited to hear how this album turns out!!
Paul