controllers

[losixxxt45]

Does an XR-3 come with a receiver?

What is a better digital controller for a begginer M-8, XR-3, 3PDF, Hitec 3D, or a futaba 3PJS PCM?

What is the fastest a XXXT can Go and what would it need?

What are the best metal gear servo's that fit in a xxxt?

[HauntedMyst]

Yes

The M8

As for the maximum speed, An XXXT should hit about 27 or 28 depending on the wheels. If your speed controller has a hiesenberg compensator, over ride it and you could go closer to 40 or 45, but it will get hot. Drop in a 10 or 12 turn motor and get an aerodynamic body with port thrusters (I recommend the Proline Maxispeed) you could hit 60 or 80 with the right gearing but you'll have to adjust your on board stabilizers (see the manual addendum).

Good luck!