... and lose the peak limiter that's switchable between MOS-FET and J-FET?
I use a peak limiter a hell of a lot more than I use a de-esser... but there is a side chain available to the delta-MU compression section should you decide that de-essing is indeed necessary...
Bro, you couldn't cram a paper clip in the thing... http://www.pendulumaudio.com/QuartetIIHiRes.html
mean... could you find space on there for a de-esser? We couldn't. That, and it's a different kind of thing from the original 'Quartet' in that the compressor in that the gain reduction cell on the original 'Quartet' is an "opto" based compressor and the gain reduction cell on the "Q-II" is a 'delta-MU' compressor.