Hi i have many 1/24 tanks you will like it they are very strong and you can beat the hell out of them and they won't break like how the 1/16 tanks do..

Also the new tiger 1 from VS tank has a new controller much better and it should be able to be used on the older tanks also.

As for the clicking sound this is not a slipper clutch to protect the gears it is a slipper clutch that makes the tanks motors go the same speed so it always runs in a straight line... they use it because there is no trims to control the speed of the motors.

Also you can't put a 7.2 pack in the tanks because they use jumpers across the 8 AA's to get different voltages from them to feed into the electronics so you get different speeds and voltage for the movement of the turret and gun fire and elevation and so forth.

Look at www.toyeast.com look at the new IR tiger it has a sweet controller now and real gun recoil and also better sounds with machein gun fire to boot!!