Cracking out versus Crossing

If I've got several very nice PCI MS63+ coins (based on my grading as well as PCI) and want to submit to NGC (I've got 5 free Early Bird submissions) should I crack them and submit raw or should I just send them in the PCI holders? Opinions?
Curmudgeon in waiting!
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Comments
Russ, NCNE
I haven't submitted to NGC so I don't know about their possible bias. I recommended cracking them out based on my experience with PCGS, that I believe is biased.
My PCGS record.... 0 for 3 on crossovers, 3 for 4 (hitting my target grade) on crackouts. The one I missed will get another shot at a later time (PCGS dropped me from NGC MS62 to AU58
NOTE: No trees were killed in the sending of this message. However, a large number of electrons were terribly inconvenienced.
Type collector since 1981
Current focus 1855 date type set
Now if it is NGC to PCGS, that's another story. Despite the fact that you probably have about much chance as a snow ball in hell of getting a cross, I would not crack an NGC holder in most cases.
Rainbow Stars