So I decided to poach the electronics out of my new Tiger and install them in my Leopard because I just couldn't wait any longer. I apologize in advance for the pictures not being the best, my camera is currently at Nikon being repaired. This swap does require a little bit of soldering, so be aware that it's not a direct plug and play.

First order of business is obviously opening up both tanks, my donor being a Tiger 1. Separate the upper and lower hulls, remove the turret gear and turret, split the turret and remove the airsoft unit, barrel, elevation unit and switch. I'm going to assume that can be done without pictures. The first picture shows the difference in wiring on the older version (left) vs. the newer version (right).



You can see there are 2 positive wires on the original elevation unit. On the original HL tanks, the on/off switch for the airsoft gun is soldered between the positive of the airsoft motor and the positive of the elevation unit. Go ahead and remove this switch, we will not need it. The elevation units are the same, so I mounted the unit from the Tiger into the Leopard turret.



Next up we are going to remove the 3-pin connector from the Leopard airsoft unit, which is also tied to the elevation unit. Remove the white/red wires from the old elevation unit and set the unit aside. Now remove the rblack wire of this same 3-pin connector from the motor on the Leopard airsoft unit and set it aside. Now all we have to do is take the 2-pin plug off the Tiger airsoft unit motor and solder it to the Leopard unit motor.



When done it should look like the picture below and you should have the 2-pin on the back of the airsoft unit, the 2-pin on the airsoft unit motor, the 3-pin from the MG LED and the 2-pin on the elevation unit. The cannon LED is soldered to the airsoft unit motor connections to get its power when shooting, those are the red/black wires up at the top. The red/white go to the MG LED.



This is the biggest difference from Tiger to Leopard, the MG LED on the Tiger is in the lower hull and soldered to the mini PCB and the Leopard has the MG up in the turret next to the cannon. You can see that the Tiger board has an empty 3-pin location and we are going to use that for the Leopard MG LED connection with a plug, where on the Tiger this same connection was soldered to the bottom of the PCB on the same pin locations. So, now we need to remove all the wires from the mini PCB in the Tiger.





Now solder the red/black for the Leopard headlights here.



That's it, we are done with the soldering! Now just feed the wiring back through the turret ring gear, screw the mini PCB down to the Leopard chassis and plug the plugs in like they were in the Tiger. Shown in the picture they are (top) RX18 Cable, (left) MG LED 3-pin, (middle left) airsoft motor 2-pin, (middle right) turret rotation unit 2-pin and (right) elevation unit 2-pin. The 2-pin from the airsoft unit goes into the MG Fire port on the MFU.



Fire up the tank to make sure everything works before you zip-tie the wiring and put the hulls back together! The only thing I left out was swapping the bind button. Older versions it is a 3-pin connector, new versions are 2-pin. It would just take swapping the plugs. I also swapped turret rotation units as the Leopard unit is really loud and the Tiger is much quieter. You don't have to do this, I chose to. Good luck and feel free to ask questions, I'l try my best to answer them!