if you are only running it in your ta-05 why bother with the 3rd channel, go a Dx2.
the only things i know of that use a 3rd channel, is rc semis and nitro/petrol boats as a fuel/air mixture.
Tamiya 415MRE- GTB +10.5- Spektrum = 19t
Tamiya F103gt - 17.5t -lipo(yah) = 2wd stock
Tamiya M03 -Spektrum - NiMh(boo)= Mini
Bodgy Brothers Racing......19t,Stock,Mini,540,2wd stock