For sale here is my DIY GSSL Mix Bus Compressor. It's the stock standard one, no turbo board or SSC board. Uses THAT VCA's.
You'll notice there is indeed a turbo switch on the front, but it's only there because the case I bought had a hole for it. The switch is there purely for aesthetic purposes.
I don't have a photo of the insides from when it was completely finished... as you can see I took this one before I'd wired in the IEC connector, but as you can see in the second photo, it does indeed fire up. If it's that important to you I'll open it up when I get to the workshop on monday and snap some more of the guts.
Works perfectly, sounds great on drums, mixes or just about anything you hit it with. I'm selling it to fund building another one with the Turbo and SSC boards, as well as finish my Pultec Clone.
$750 plus postage.

