Thanks Hal! I checked it this summer but you inspired me to climb the stairs to the porch above the garage and eyeball things again. No sign of deterioration or water infiltration yet after 6 plus years. I did find a failed plastic anchor which I need to replace. It doesn't make sense to me to tear it apart to redo it. I'll probably just eyeball things semi-annually and check signal strength off the transponders and acquire the parts should things start going south.

Your method doesn't require special tooling, just boots with silicone so it wouldn't be cost prohibitive.
Thanks again,
Joe