Originally Posted by echo7tango
And also, why tape?
Haha, you wouldn't ask if you ever heard the sound that's made when the screw works loose from the nutsert. That said, I just hit my screw with some blue Loctite and the screw has remained tight ever since (no tape) and no vibration sounds. I believe some people have used both tape and screw for the rear aspect of the mount, but I'm guessing the majority are just using tape.
Regardless, it's not like the tape is the only thing keeping the plate attached. It's just used at one point of attachment and prevents the plate from vibrating independently of the chassis.
Buy the plate. You'll be happy you did.