1, previous owner updated it to John East preamp. Vol, Bal, Tone (pull to passive, works in both modes), bass, treble.
Extremely musical preamp, I like it very much. I run it set flat in active mode most of the time, using tone pot only. Both pickups have very different voicings, so it's actually really universal bass.
I had more Lakland HBs in past, but always preferred sound of Chi sonics over sometimes too dark Barts.
2, ergonomy is top notch here, even balance on strap is great (4,2kg). No sharp edges at all.