I didn't see this thread so I already picked up the same kit from another seller on Ebay. Might even be part of your business?
Anyways, I didn't even think about the fact that the Exedy OEM disc was unsprung. Mated to an unsprung/conventional style flywheel is a really bad idea for a street car.
Why don't you just change the kit to include the Exedy OEM disc from an N/A Supra instead? That will be a sprung disc (That's what I just bought to replace the unsprung disc)
2002 AR IS300 5-speed w/LSD
/TTE Coilovers/Eibach Sways/Endless pads/Work Equip 05's/Wald blah blah blah
2002 IBP IS300 SportX 5-spd swap (Mom's ride)
1986 AE86 Corolla GT-S
1991 Toyota 4x4 5-speed Pickup w/22RE
1992 Previa AWD