So, doing some additional snooping, I confirmed that the '16 Axis has MaxFans installed which have the built-in mounting tabs on the top. MaxFan sells their own "EZ CliP" FanMate rain covers which are a bit more expensive but they install with metal clips instead of drilling holes and mounting brackets. Ordered through Amazon....we'll see how it goes when they get here. Thanks again to all for your information.
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