Why would you need to use both Mana. One Mana is more than enough to propel the tank. Just place it in the back of the unit to beef up the mass of the drive assembly. I agree with what I have seen so far the tracks for this set look very stiff unlike the flexible ones with the Manas. It is easy to get the Manas to turn in unison. They have a three (3) channel IR system. Set both to the same channel and they "dance" very nicely.