Switch Panel for Boat

This is just a simple switch panel I made for my boat. Most boats have these items installed so I got these waterproof switches from amazon.com http://www.amazon.com/gp/product/B00RZ4WEIA/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1 This panel is 4 mm thick and I filled it 10% with a standard wall it seems plenty strong and the switches snap in perfectly. Or if you have other switches you can resize the holes ofc. The words file is just to designate the items I intend the switches to activate