Display MoreWhat we are printing as a prototype right now solves this problem much easier without the need of an extra set of set screws. As you can see in the picture attached the inside of the cap has a hex machined into it that fits over the outside nut, then there are set screws that lock it to the inside nut.
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The 3D printer is printing one out now that I will test in the morning on several of the Slingshots here for fitment, and if everything looks good, I will send it out to @mytoy to have him try it on his Slingshot also.
That is an elegant solution. Locks both nuts against each other for extra security. If Polaris ever ends my replacement swing-arm and I get the double nut, I'll certainly consider that.