First I designed an acrylic ring with 4 holes for 1/4" acrylic rod avallable at any plastics supply store.
Using Corel Draw or AutoCAD, the dimensions of the ring have to be customized for your camera, I used a 1.8" inner circle and a 3.8" outer circle, the proper dimension for the 1/4" rods is .255" for a tight fit.
I made it at the Tech Shop
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You should post an instructable on how to use it though.
I have copied old slides that were faded and color was all wrong, Photosop did an amazing job.