I am in the process of retrofitting a new cowl to an existing RV-6A. I got to the point of picking up the Skybolt locations on the cowl and wasn't satisfied with the ambiguity that using the provided disk-shaped magnets gave. While two disks would align great when they were in direct contact with each other, when spaced away from each other by the tool and the thickness of the cowl, the area of uncertainly greatly increased. I saw where some were trying the green magnetic film, but once again when spaced away from the magnet the image gets diffused Another method was needed. I searched VAF and didn't find this solution, and so I am posting this hoping it can help someone.
It involves a small sewing needle and 1/8" ball rare earth magnets. Follow this link for the video. Sorry about the echo in the video. I may reshoot it if I get a chance. https://youtu.be/tPimmqSwzkM
The lines of magnetic force converge at the poles pulling the needle to dead center. I think ball magnets of the 3/32" and 1/8" size along with the needle could be used to accurately locate rivet holes in aluminum sheet as well.
It involves a small sewing needle and 1/8" ball rare earth magnets. Follow this link for the video. Sorry about the echo in the video. I may reshoot it if I get a chance. https://youtu.be/tPimmqSwzkM
The lines of magnetic force converge at the poles pulling the needle to dead center. I think ball magnets of the 3/32" and 1/8" size along with the needle could be used to accurately locate rivet holes in aluminum sheet as well.