[Jac Mac]

Russ, you missed one point in the power flow, the 4-lugged plate housings also drive the cross with the spider pinions which in turn drive the side gears axles- now note the ramps that the 'cross shafts' climb up on to apply clamping force to the clutch plates under differential action- now if those 'ramps' had different angles to apply the 20/80 forces under deccel/accell or whatever then fine, but to me they look to be the same angle & therefore would apply the same amount of clamping force in both directions. Since the clamping force applied by the ramps/side gears is virtually fixed the best way to acheive a more effective LSD is to increase the number of plates per side. ( that increases the friction surface area ).

P.S. There should be more driven plates-The ones with the friction material & splines at ID.