I think i got about 5 on my 2" rear drop on the H&R sports, and my rear tires wear perfectly. I went all spring and summer without any abnormal wear on the rears. My alignment spec sheet that was given to me verified my specs. I personally would not put 7 washers on. If you need that much camber correction, then purchase some Ingalls rear camber kits, as those are made to correct safely for that much negative camber.

13.5 @108 MPH-2.2 60ft(stupid FWD!)
S16G @ 18 PSI/FMIC/Running on MegaSquirt II (Now with sequential
fuel injection)
My webpage: http://eclipsed4evr.home.comcast.net
-1998 Mitsubishi Eclipse RS-T- "Toy"
-1992 Plymouth Laser Turbo AWD(SOLD)
-2000 Honda CR-V(daily)