Why would you have to balance "as a unit"? Shouldn't the flywheel, pressure plate and disc all rotate independently?
The pressure plate rotates with the driveshaft? The flywheel rotates with the transmission inputs shaft? and is the disc afixed to anything or does it just do it's own thing until pressure is applied from the pressure plate onto the disc thus pressing it into the flywheel?
Or is that all hogwash?
