OK, here we go. I am building a new flat 8 that will be my test copter for test projects. Among the projects I plan on testing include the emergency landing and fail safe crtieria, more on that later. Right now I have a brand new MK dual Quadro 2XL board with the redundant features that I will be testing out. Here's some pictures of the project so far. Here's the board and as you can see they are starting to use dual lipo cables now so you don't have to create a splitter cable. When I get a new board I double check to see how well the heat sinks are glued on. I have had a few that were glued really solid but some have come off with a simple tug using needle nose pliers. This board came with a set that was not glued too solid so I just removed them all. I use Castle 4mm bullets on all my MK builds. They are super solid and have never had one come loose or had a wire come off mid flight. I mask the entire area around the pads so that I can't get any solder or flux splash. I heat shrink the lipo cables so that I don't create any RF interference. Here's the master FCB and the slave FCB. The slave is on the right and you can see the custom UCART connector. Here's both boards on the hub. Close up of both boards. Here's the entire stack.