Would a GoPro or waterproof back-up camera and a Smartphone mounted in a waterproof box be a legal alternative to mirrors. In Texas you just need a 4" mirror. I can't seem to find a good place to mount one. I could use a camera and a Bluetooth connection to my phone. The only concern I have is glare but I think I can use polarizing film on the case to fix that. I think that I can fabricate my old Samsung S4 into the bottom side of the storage compartment lid.