This flexible chassis has been significantly modified from the jig-built flexible chassis. The specifications are as follows: Bridging Construction "The front and rear units are connected with aftermarket straight carbon fiber that has been split, increasing the strength of the center chassis and preventing cracks." Underside Raised with Liner "When using 23mm tires, the bottom of the chassis will hit the ground upon landing, so raising the chassis bottom is essential. A liner is installed to raise the bottom by about 1mm, and it has been polished." Battery Coverless "The battery is held in place with a rubber liner for weight reduction." Damping Rubber "It provides solid damping to keep jumps low and landings smooth. The black spring has been pre-cut by one coil, which is essential for 3D courses." Aftermarket Carbon Fiber Stay "The chassis shaft has been cut, and aluminum shafts with black countersunk screws are used. Carbon fiber provides stable prevention of sagging." Shaft Hole Reaming Completed "There are individual differences in the shaft holes, and some holes may not fit a 620 bearing, but they have been expanded with a 6mm reamer." Spur Gear Clearance Processing "The gear covers have been shaved to prevent the spur gear from contacting them." Front and Rear Bumpers Raised 1.5mm with Reinforcement "Raising the bottom is essential for bank through when attaching brake stays. Also, because the base becomes weaker by raising it, carbon fiber reinforcement is applied from the inside, and both front and rear are reinforced with black instant glue." Bumper Cut "The post-processing after cutting the bumper has not been touched. It is recommended that you adjust it when installing an AT or anchor system." Normal Terminal Voltage Adjusted "If the normal terminals are well-polished, they will have good electrical conductivity and can be used longer than gold terminals, which get scratched. Each voltage has also been increased with brakes." Normal Gear Cover Screw Fastening "The normal gear covers often come loose, so they have been secured with screws. Also, the motor is supported, and the voltage does not escape. This is also essential." Counter Gear POM Support "The counter gear is supported by POM with a low-friction plastic bearing set, which is expected to increase torque due to low friction. 520 bearing installation is recommended." The chassis is designed to be durable and stable. It is a chassis that bottoms out quite a bit, so gear clearance processing must be done without piercing through. The voltage increase can change the speed by 1000 RPM, so the chassis has been designed with voltage increase in mind, with the motor securely fixed, and with a solid suspension and damping." The switch protrudes, so please cut it to your preference. Thank you for your consideration.