Originally Posted by slippahs

OLCI draws elite upgrades from R class. If there is no R class at OLCI and you go ahead and print your BPs any way, you will miss an upgrade IF R class is later opened up and the EUA is run after having done OLCI. If you cancel out of OLCI, you are not precluded from grabbing an EUA'd upgrade because an R class seat opened up.

Yes, this seems to be, IMHO, the wisest way to proceed if an upgrade hasn't been rec'd in advance. You apparently still make it on the upgrade waitlist, and canceling out still makes you a contender for an EUA seat if an R class becomes available past the 23:59 mark. Also, you can OLCI and cancel later if you note on EF/KVS that an R class seat has become available.