Has anyone mounted their QS-4's using an Omnimount 10.0?

It would seem I am going to have to drill the QS-4's in order to use this mount. The srews provided are #14 3/4"......Is 3/4" too long? I don't want to pierce a driver by mistake.

Would be great if anyone had pictures of QS-4's with an Omnimount 10.0 ceiling mount?

Thanks,

Craig