I've just finished putting together the circuit for the SSL 4000 quad comp from Gyraf.....this was my first electronics project....
I was having some trouble with the left side oscillating on certain threshold settings and the output was a little lower?....after proding around, blowing up a few parts..resoldering EVERYTHING, checking a bunch of resistors....etc...and spending wayyy too much time(weeks) troubleshooting...turns out i had forgotten to 'ground...the...left...side'.............

lol
Anyways, everything appears to be working now that the 'ground' is connected.... The unit sounds good....really slams on higher thresholds...has a wide frequency response...clean...the VCA's were the 2180La...
I've attached a pic of the unit during testing....
This project would NOT have been possible if it wasn't for the great folks at prodigy pro...thanks all...i've almost finished my first one

Next is two 1176's in a 2u...
Over and out.