The "strings" are cables that are plenty strong to carry loads in tension. The problem here is not reliability or strength, but the unnecessary complexity and expense of the design. About the only possible advantage that I see is the biopace effect of the cams.
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What, Me Worry? - Alfred E. Neuman
I'd like to think i have as much money as brains.
I see the light at the end of the tunnel, but the tunnel keeps getting longer - me