I carry a Guiseppe 1x2, an Instroke Buffalo 3X5, or a Whitten 2X4 depending upon where I'm going. I also have an Instroke Premier vinyl 3X5 and a Murdock 3X6, but never use them anymore.
Currently a 3X4 Whitten. I did notice on Jack Justis website that the new interiors look to be be thin and easy to clang the cues together. Can you request the older tubing on new orders? Whitten and Justis cases are my favorite two.