I am trying to mount the Axiom Full Metal Bracket (FMB) on my VP150, so I can mount the VP150 on the wall on top of my TV.

The diagram here:
http://www.axiomaudio.com/FMB.html#

shows wood screws being used, but there is a screw already in the back of the speaker, exactly the same as the QS8s. (I already have my QS8s mounted using this screw through the middle of the FMBs).

However, unlike the QS8s, the washer underneath the screw did not come off when I removed the screw, and when I put the bracket on over top of the washer the FMB is not really sitting flush, as it is now 1mm away from the speaker.

Can I use the speaker like this, or will I run into problems? Is that washer supposed to come off? I hesitate to pull it off with a screwdriver, as I dont really want to damage the speaker finish.

Anyone?