K Bojar , Aurra & Potato,
Thanks a lot for your info.
If I may conclude all your comments: "Do not use the servo horn with Futaba written on it, cos' it will strip / your car won't center after a hit! Unfortunately, Tamiya does not support HITEC servos!"
So my next questions: What is the solution guys? Any servo saver produced by other manufacturer that may fit? If yes, what is the brand and the part number will be very helpful.
Potato, which adapter you use? Tamiya's or other manufacturer? I thought the kit only provide 1 servo saver that fits for (KO, Sanwa, Acom) and other servo saver that fits (Futaba and Tamiya servos) ?
Thanks again guys.