Budget racing the old nuts & bolts

Okay I think I have something here that looks pretty stable.? I used a couple old front shocks and drill holes in the wood for the shocks. That seemed to really stabilize everything is when I drop the harmonic balancer down on a little piece of wood and took some weight off onto it a little bit and that seemed to stabilize everything pretty well. I assume setting weight on the harmonica is not going to hurt anything?
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The outer ring around the rubber of the balancer is cast iron and not very strong.
I would be afraid if I left it like that very long it might get out of balance even if it didn't break.
But, you know what they say about opinions. :D