I had used this a while back but wasn't satisfied.
I currently have the Aker mic, cut so that I have only a small amount of the mice boom arm to deal with. It is velcroed in place in my bucket. In my forehead are, I have a wireless transmitter, which fits very well, and with the addition of some foam, is a nice way to keep my bucket stable.
The transmitter then sends the signal to the receiver, which is in the left side of my chest armor, held in place by elastic. This way the sound still sounds like it coming from my head to some degree as my Aker amp is in the right side of my chest. It's positions so that I ca sort of reach the volume control.
I also place my iPhone in the chest with the Stormtrooper loop or Death Star loop playing.
At one time I had used the Hovi's with the speakers in them but was never able to get decent volume out of them. Also, they were so close to the mic, feedback was an issue.
With my current setup, I do encounter some feedback, but I had large fans in my bucket, and the mic was too enclosed. If you place your hand around a mic, you can create feedback, same idea. I am placing smaller fans in my bucket, so I'm hoping I'll have more room around the mic, lessening the feedback.
The main problem that the wireless system solved was that it was impossible for me to get my bucket on with a headset.