I used the 17,5T Speedpassion Spec-Motor and Cirtix Stock Sport Club Speedo. 30T pinion/81 Spur. Yuntong 5000mah 40C battery.
I kept the stock-radio, because it does everything I need. I never user expo and other electronic helpers. I also kept the stock servo.
I have to look after a wobbly steering and two bent rods after that day. But these are only minor issues. Car is working great. Thumbs up, Venom!