You can do this "Drive Switcher" yourself by using two (or three) stacked 40pin IC sockets and make the proper switching by wires on pin 13/14 and a 2-way, 6-pin switch. This is like "manual" switching.
This board offers a "chip" to do the switching, with either a jumper or a simple on/off switch (3 pin). It makes things interesting as you can, with proper circuitry, do the switching by reset (timer).
I like the board but the chip that came with the board was busted and it could be, probably, my fault! I used a better brand (DM74LS157N) to replace the existing one and everything went fine.