With the exception of one place where I have used Tortise switch machines to raise and lower crossing gates, rather than turnout control, I have mounted all my actuators on top of the table. This is because the mean elevations of my 14' x 13'7" layout are 32" and 36" AFL (above floor level), (for operating seated and so small kids can see the trains more easily), and because my old bones don't get up so easily, the actuators are easier to maintain and adjust. Where I have used Atlas turnouts, the electric switch machines that attach to the turnout are controllable electrically from the control panel. Where I have used turnouts that do not have integral switch machines, such as Shinohara, I have used several machines, including the old Kemtron twin-coil machines, usually disguised as piles of dirt, ties or hidden by folliage or inside a building. In other places, where I have used Peco turnouts, which are in areas where I don't need to switch them or are close enough to reach, I have either depended on the internal springs attached to the throwbars, or in some instances have gone with Caboose Industries ground throws, having removed the little internal springs. It basically comes down to WEW (What Ever Works)!