This flexible chassis has been significantly modified from the jig-built flexible chassis. The specifications are as follows: Uses the red chassis of the Avante Mk.III Nero "Changed to a red chassis made of ABS resin" Includes under-bottom lift liner "To prevent the bottom from hitting the ground when using 23mm tires, it's essential to lift the chassis bottom. A liner is inserted to lift the bottom by about 1mm and polished." Battery coverless "Uses a rubber liner to hold the battery in place for weight reduction." Damping rubber "Provides solid damping to keep jumps low and landings smooth. Black spring with one coil cut, essential for 3D courses." Aftermarket carbon stay "The chassis shaft is cut, and black aluminum screws are used. Carbon is used for anti-sagging because it firmly fixes the shaft, allowing for longer use and eliminating irregularities." Axle hole reamer applied "Axle holes vary in size, and some may not fit 620 bearings, so they have been expanded with a 6mm reamer." Spur gear relief processing "The gear covers are cut to prevent the spur gear from contacting them." Front and rear bumper 1.5mm bottom lift reinforcement measures taken "Bottom lifting is essential for brake stay installation and bank through. Also, because the base becomes weaker by lifting, carbon reinforcement is applied from the inside, and both front and rear are reinforced with black instant glue." Bumper cut "The post-processing after bumper cutting has not been touched. It's recommended to adjust it when installing AT or anchor systems." 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 is also increased with brakes." Normal gear cover screw fastening "The normal gear covers often come loose, so they are fastened with screws. This also supports the motor and prevents voltage leakage. This is also essential." Counter gear POM support "The counter gear is supported by POM from a low-friction plastic bearing set, which is expected to increase torque with low friction. 520 bearing installation is recommended." The chassis is designed to be durable and stable. It's a chassis that bottoms out quite a bit, so gear relief is necessary to prevent it from going through. The voltage increase can change the speed by 1000 RPM, so the voltage increase is considered, the motor is firmly fixed, and the chassis has a solid suspension and good damping. The switch protrudes, so please cut it to your liking. Thank you very much.