Hi. I have 2 x SX3. 1 for indoors and 1 for outside. The outside one I Have GT SP. And the indoor 1 has the Tekin RS pro in. This alot smaller than the SP, but the only downside to Tekin is.....programing on the day of racing (unless you take a laptop). The great thing about the SP esc is you can change the set up without a laptop.
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