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I'm about to replace my stress fractured 320 spinner backup plate which also had the rivets on three of the four doublers fail.  I've already received some great advice and I'm looking for more.

For example, Ross at the factory suggested that the doublers be well glued with Hysol to the backplate before riveting to more effectively distribute the loads on the bolt holes.  Brian Winterberg and his friend, Fred Baron, built in a baffle toward the nose of the spinner which fits over the hub and supports the forward walls of the spinner.  This prevents all 13.5 inches of the spinner's length being carried only by the backplate.  Finally, I read in the 3/97 issue of LNN that Robert Sternfels had a rubber disk mounted on the front of the hub which fits snugly into the nose of the spinner which accomplishes the same goal sought by Brian and Fred.

I would greatly appreciate any other solutions or variations on a theme that others have evolved to solve this not uncommon problem.
Thanks,

Byron Fox
LNC 2
N3144C
Mill Valley, CA

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