The view from above shows  the two "alternative" suspension methods: Rubber foam feet for the bars, stiff wire for the tubes. 
Here is a closup. The loop of the wire stabilizes the bar and prevents swinging. At the bottom of the tube, the wax can be seen.
 The resonator tubes form a nice arc.
Here it is!
:) :) :) The sound is really cool now, it definitely sounds like a marimba :) :) :)