Depends on which EQs you want to have. You could build the same circuit that rane used in the master eq. It is no isolator but it is a good eq circuit that makes no phase problems.
But in the end you won't have enough space in the mixer to put this in for every channel not even for only one channel I think!
For the line pots you need the same resistor as the faders. In my version
I have 50KAX2. You could also use the linear version 50KBX2, then you have another curve. If you want to test out if a linear curve could be better for you, you could put the crossfader in a line channel. The crossfader is the same as the line faders only with linear curve.
PM me your mail address and I will send you the file.