There are four rivets for all models except the VooDoo Dove which only has two rivets. Small Mojo motor must be drilled out using a drill and drill bit. This removes the motor and mounting bracket from the shell. Remove the two setscrews securing the motor to the mounting bracket and remove the magnetic adapters from the motor. Steps for installing the Mojo decoy motor and mounting bracket into the decoy shell are in exact reverse order as steps for removing.