LATEST NEWS:
I tried to bond the stock TK.6-0 command board many times with no result. I can state that this board is
oficially dead
I found a cheap RX.18 + controller + speaker and bound cable on a Spanish RC dealer site and I bought it. I have succefully bond the new old RX.18 board (with the controller it came with) and I finally have the Jagdpanther running again!!

So I partially solved my issues with the Jagdtiger!! Now it's running and it's simply amazing how the new motor, the metal hull and the all metal suspension, wheels and tracks behaves!! It has been worth all the headaches and invested money.
However, this good news are leading to more issues...
THE STOCK PARTS OF MY JADGTIGER ARE FROM A MUCH NEWEST VERSION THAN THE RX.18 BOARD!!!!
Everything from my Tank was designed and manufactured to run with the newest TK.6-0 command board. This means that now with the RX.18 board I bought I downgraded the whole thing and while the tank runs and makes sounds, the smoke unit, elevator, lights and BB system is not compatible thus not working. I feel a bit stupid, but thanks to all this I am learning a lot.
What can I do now? Should I have to buy all the older parts per separate and replace the stock/newer parts with them?