Scratchwerk,, the wheels are alloy with rubber tyres, the radio should be simple your tracks should be either on two sticks forward and reverse used together or there is a mixer giving forward on one track and left and tight on the other the other two sticks operate turret rotation, the sound unit is usually on an encoder rotary switch to select the sound and a rocker switch to activate the sound unless he’s used the complicated method of having the sounds on one of the sticks so you have to move one left or right a number of times to select the sound if he’s used that method then yes that is complicated.
So you don’t have to remove the turret or the main engine deck all the time to fill the smoke unit I installed filler caps on the engine deck with the feed pipe attached below, all I had to do was unscrew the filler cap then fill with oil.
