Abstract: A quick-release body attachment system for model vehicles, wherein one or more grooved pegs are inserted into one or more alignment holes of a cantilever straight spring assembly, as the vehicle body is attached to the vehicle chassis. Once the grooved pegs are fully inserted, cantilever straight springs spring into groove of the peg, securing the vehicle body to the vehicle chassis. Applying force to the release handle mounted to the cantilever straight spring, release the spring from the groove of the peg, allowing the vehicle body to detach from the vehicle chassis.

Abstract: According to an embodiment, a sliding gear mesh includes a chassis, a prime mover mounted on the chassis and fixed in position relative to the chassis, a prime drive gear coupled with the prime mover and driven to rotate by the prime mover, and a sliding gear assembly. The sliding gear assembly includes a sliding drive gear that meshes with the prime drive gear. The sliding gear assembly is slidably mounted on the chassis to slide toward and away from the prime drive gear to adjust a mesh between the sliding drive gear and the prime drive gear.