This nano size rock crawler frame designed for mods kit for "Yokomo NanoQLO" nano size rock crawler. Original stock "Yokomo NanoQLO" model comes as RTR (Ready To Run) out of box infra-red controlled model, motor-on-axle driven 4wd (MOA), semi proportional steering (3~5 step movement..very jerky), scaled but twitchy suspension and runs off lower than 100mah of single cell lipo. After playing around few days crawling around a small scale rocky track on around desktop's obstacles, the model doesn't pleases me much because of less proportional control on the steering, infra-red control and feels cheaps or more toyish feels rather than a hobby grade models. Wasn't up to rival againts Losi Micro rock crawler or Red Cat SUMO when it comes to real scale and hobby grade feel model but since its at 1:43 scale its a huge advantage as being a pure desktop fun basher...if it were to fit with real R/C grade electronics then it would definately pump up its status. My goal of this design is to built a small nano frame that could fit hobby grade electronics such as 2.4ghz with more proportional control both steering and throttle, higher capacity lipo, solid axle movements, low cg frame, super compact and able to fit aftermarket scale plastic body models such as Hummer, Jeep, Rover and other truck body with special mounting on the frame. For more details and instruction can be found at this url:http://www.supermotoxl.com/Real-object-design-for-hobby-models/Real-object-design-for-hobby-models/xl-rcp-40-shockless-frame-for-nanoqlo/menu-id-118.html