I've found the remote audio rainman to be not so great. try finding some Hogs Hair air filter material and build a cover in the same fashion as the rainman. this is the material FX use to dampen (pun intended) the sound of the rain on stage.
wrap the zeppellin, make a cap for the back end and fasten it with small zip ties. once it is built you should be able to slide it on and off. use this on top of the windjammer.