I finally did a job on the Grout I have been dreading. The two 5/16 carriage bolts that hold the step plates to the main frame rail have to be drilled through a 1 inch thick by 4 in tall wooden rail. This rail is not Square as it flares out as it goes upward. My concern was how to insure the drill would track straight from top to bottom of the 4-inch wooden frame rail.
I made a quick drill jig out of a 1-inch thick block of aluminum and an aluminum plate. The holes I needed where drilled on center of the 1 " thick aluminum block with the correct center to center distance for the bolts to fit the step plates. When bolted to the plate and then clamped to the frame rail the holes would follow the angle of the frame rail top to bottom. I chose to drill from the bottom so it would be easier to get the chips out of the holes and would help to keep the drill tracking straight.
I'm very happy to say all four holes ended up just where I wanted from top to bottom. On both sides the carriage bolts pass through the steps and the 4" frame rail. I'm done for the day.
I also hung four, 4 foot LED shop lights to improve the lighting in my work area. It was a busy day.
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