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This battery tray is intended to be placed up front, near the servo.
It is designed to bolt on the standard servo mount holes.
You will also need to remove the scross bar between the front shock towers in order to fit a battery.
You will need 4 x 12mm M3 flat head screws and a velcro strap no more than 14mm wide.
Total length is 120mm.
Usable battery length is 116mm (a lot of 2200MAH 2S and 3S options available on the market).