Wow, don't mean to cause such an uproar regarding the 3rd wrench. It is merely a personal statement.

I did encounter the problem which the large nut turn with the bottom nut. As I remembered, all I did was to use a small channel lock on the large nut and a wrench on the thin bottom nut to work them loose between them. Simple and easy. That is why I said I found no need for the 3rd wrench.

I appologize if my statement offend someone.

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Shane83SD