If you are gonna remove your TM on certain occasions, I would recommend using nutserts, or RivNuts to mount the unit to the boat. You don't need a bracket then. Much cheaper to do. I use the 1/4-20 RivNuts and use the 1/4-20 screws that come with the unit. Just screw the TM on and off this way. If you have an Xpress, that's how your factory TM is mounted.