Going to help a client on an out of town camera installation tomorrow. He tells me the building has dryvit on the exterior. (1/4" plaster + 1" styrofoam) This is an analog camera system, so I will also have an outdoor box for the connections to the siamese cables. I have never performed an installation on dryvit. I typically use SPAX screws for mounting directly to cinder block...the likely structure behind the dryvit. I am very doubtful I can make these work...even if I can find any of the proper length. Any recommendations for the proper mounting of the cameras and outdoor boxes on dryvit?