You know those axel supports are always a good idea. I even have a set for my Tamiya Panther that i still need to install. That tank is almost bullet proof with the gear boxes i have but every bit of support added is a bonus. Takes a lot of the stress off of the gear box bearings that way and will help with track to sprocket alignment. Also some metal plate under the hull below the gear boxes help a great deal in eliminating flex which helps keep the tracks on the sprockets.