WBT binding posts on 803's w/bananas?

Has anyone used banana's on the B&W 803's? I currently have mine going through the angled holes instead of straight into the end.

I e-mailed B&W, and I will do it again, but was hoping for some wisdom from those who have done it. B&W replied that I could plug the cables straight into the end after removing the plastic plugs, I am having no success.

Below was their suggestions, I have tried using a screw, they are not budging!

"The WBT binding posts on the N803 do allow banana plug connections, in order to do this the small plastic plugs in the center of each post should be removed. The easiest way to do this would be to use something like an icepick to pry the plugs out, or a small screw to thread into the plastic and pull them straight out. The other alternative would be to unscrew the posts and try to push them out from behind. Once these plugs are out, you should have no problem using banana plugs with your speakers."

I should also note, I have no idea how to unscrew the posts to try and pry them out, they only unscrew so far and stop.

Oh how I wish this hobby would adopt some standards, like either RCA or XLR and Spades or Banana, not both!!

Thanks in advance,
Brian