LOL! Maybe yours - not mine. I have an Otterbox iPhone Defender case mounted to a Kuryakyn Harley Fuel Door Accessory Mount. 
I have seen the Otterbox defender, but did not remember that it was waterproof, so I just checked their website and it states on the bottom of the page ----- Otterbox iphone defender case is
NOT protective against water. It specifically states that it is only good against shock, drop and dust intrusion. I doubt that mounting it to a Kuryakyn fuel door accesory mount would make it waterproof ??

IMO -- the gaugeface for $250.00 is a lot of money to spend for gauges that you already have, and turn indicators that you already have. You are only gaining a temp gauge and an ugly electrical connector hanging from your dash. If your bike is running to hot -- what will you do about it anyway -- quit riding it until the sun goes down? As for the "heads up" display --- you can also see the same thing by looking over the widshield. But to each, his own. I have surely spent more than $250.00 on things a lot crazier than the Gaugeface. Let us know how you like it. Maybe there will be something that I am missing.