In a previous article, I began using 123D Catch to create a 3D model from still photographs. My project is to print some replacement feet for a patio chair. These were originally made from injected molded plastic. Several have gone missing over the years. Before I can print the replacements, I need a model. I can create this in CAD, or by using 123D Catch. I thought the latter would be easier and faster. But from where I am on the learning curve, it might not be.