I just got a rosewood large vantage folder,and the action is tight! Had other vantage models before and none were this tight. Put a couple of drops lube at pivot,helped but still a lot of resistance. The screw hole in the pivot looks very small. None of my small torx drivers fit, even #3. I was wondering if it needs a small hex wrench? I don't want to keep messing with it until I know for sure, afraid of stripping that screw. Yes I know this model isn't known for the easiest flipper action so don't mind giving it some wrist,just not the whole arm. Thanks in advance!