I was disappointed to find the Play 5 Flexon mounts did not have the option to mount the speakers vertically. So I custom built a frame without doing any mods to the original mounts themselves. I have attached pics of what I did. Unfortunately I will most likely not be able to respond to comments or questions as I am caring for my elderly parents and other responsibilities but hopefully you will get the idea and be able to build your own. All of the components are made of aluminum except for the strap.