It's a shame the companies won't work together so the battle systems would be compatible.

beesknees, open her up (a real pain on the Tiger) and place a .5" thick piece of memory\high density foam between the speaker and the top of the sound box. This cuts the volume down to acceptable levels and allows you to hear the motors and tracks running. The speakers are glued, but pop out with the help of a screwdriver. It's the first thing I do when a new VsTank shows up at my door.