No replies, I guess its not that popular. I can't give any definitive answer, but I forgot to mention I had 4 other toons also loot the trinket on the 1st attempt, and subsequently no other trinkets dropped for any of them in 7 days (blue or otherwise). I might have to delete the lock and try again, but it's 3 slots away from fully wf. I guess my best bet would be to make a new 10 lock, and don't get any WF until I get both Gruuk's Evil Eye and Glowing Endmires Stinger as epics...rinse and repeat, deleting repeatedly until I get both. Sad because my lock did get Gruuk's Evil Eye as an epic upgrade.