I don't know if this would help anybody but I come up with a device to hold my GPS recevier. I'm not crazy about drilling holes in my boat so I was thinking of a way to mount my GPS. I took a Driftmaster Railmount holder and fixed a piece of metal along with a 9/16th bolt and this is what happen. If you have a rail system on your boat these railmount holders from Driftmasters are very helpfull. I just wanted to share with you guys.