Go to Walmart and pick up a bag of #64 rubber bands and tie one on the two center mains below the bottom cross. Sliding the band up against the bottom cross provides the most dampening and against the frame the least.
When you're dead you don't know you're dead. It's the same way when you're stupid.
Balance - 31.0 cm, Weight - 358 g, SW - 346 Kgcm^2