Hi
I race a vorza and love it, it's far more powerful than needed but it can be tamed down using the esc and transmitter, which then leaves room to up the performance as you improve.
Essentially the chassis is a HB D8, which i think is a good chassis for racing, and the brushless system is the castle creations MMM.
Things i've changed/added; got grub screws so droop can be set, replaced the outer hinge pins with proper captured ones (from the lightening), and eventually changed the steering servo to a faster one, the stock one isn't too bad but i eventually wanted a faster one. also pulled the radio gear out (27mhz) as i use a spektrum 2.4.
something to watch out for; the castle creations esc only provides 5.4 volts output to the receiver, meaning if you have a servo that requires more it's a problem. the steering servo i added was a savox sc1256 and when used fast the receiver would keep momentarily shutting down, adding a power cap to the receiver really helped but didn't totally cure it, so i added a dedicated BEC that draws power from the main batteries, regulates it, then supplies the receiver.
HTH
Lee
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