You might want to read this on the buzz stop. They aren't all good news.

The Fender-style trem doesn't have a great string break angle. The Faction plate should improve this and negate the need for a buzz stop as the strings leave the plate a lot lower than on a Fender-style trem. Otherwise you can shim the neck to increase the neck angle so the bridge sits higher and improves the break angle.

I've now read a bit on the behind the bridge pickups and I see they are for specifically making a noise by playing behind there, not for in normal use. So there's typically a switch to bring it in and out. I can think of easier ways to make a noise, but whatever floats your boat!