Build Your Own Gold Rocker Box Sluice Plans DIY Prospecting Mining Equipment. This is a great Rocker Box design. You will build your own using my plans. It will be 42" high and 18" wide when you're done. Very simple and effective design. I will mail you hard copies on 8 1/2 X 11 paper. All plans are designed by Ben Stone. Ben is a retired Engineer in Canada. Ben also drafts these himself using the latest AutoCAD software to ensure accuracy. He studied Engineering back in the early 1980's. After over 30 years in the Construction industry he developed a passion for building cool items around his farm and cabin. These are great DIY projects. With a little skill anybody can Do It Yourself. Ben is always a email away if you have any questions while building one of his projects. He is adding new plans all the time.