My understanding (and I could very well be missing part of the boat here) is that repeated pulls can cause the information on your report to get split in some way because of the large amount of data - I have an old 1998 student loan in good standing that is still reporting, and a couple of old car loans, also. If I keep screwing around that might get bumped off or something.
STARTING: 11/24/10 EQ-584 EXP-648 TU04-595
CLOSED FIRST HOME 8/19/11 EQ-630 EXP-691 TU04-653
CURRENT: EQ-701 EXP-??? TU08-720
Not a good idea?