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YMMV and hard telling...
If these dropped three were brand new, then I'd guess a significant double-digit gain. If dropped due to the 7 yrs, then very little gain, if not none at all due to three more reporting. It also depends on the types of baddies. If a CA then odds improve. If a CO, then there's a potential for a loss; depends on whether or not it impacts your AAoA/length of history. Also depends on whether or not these baddies updated recently.
2 baddies were updated 5/2009, 1 was 7/2008 , i dispute those and got them deleted, the other 3 falling off due to age. also have a updated 2012 baddie thinking about trying PFD. will that also boost my score?