Looks good! The X6B receiver can have its holed xacto knifed or drilled to fit on the stack if you wish. One more thing on the frame is that the 4 holes that mount the stack on the bottom might screw into the grooved holes at the bottom after flying, eventually your stack might get loose off the frame. It happened to me and my solution was to buy 3mm x 10mm screws instead of the nylon ones that fit into the grooves. Also I liked how you have your antennas!
Awesome advice! I'll keep that in mind as time passes.