does the number of springs in the clutch disk have any bearing on quality? a couple of the ones i posted above have 6 springs while some have 4 springs. has anyone heard of those brands? also, one is 8 and 13/16ths and another is 8 7/8. which one should i get? i need to order within the next few hours, so if anyone can help me out thatd be great, Thanks!