JIGMA Mini 4WD Motor Cleaning Underwater Running-in Jig Long (Compatible with Tamiya Spare Bottle) This product may seem like a simple and unassuming jig at first glance, but everything has a purpose, and this is the resulting shape. It's a practical jig that focuses on functionality, eliminating waste and retaining only the necessary features for motor cleaning. ✅Point 1: Design that doesn't put stress on the motor By intentionally not sealing the lid and using an open structure, internal pressure doesn't build up, and no extra stress is placed on the motor. If sealed → Heat generation causes water temperature and air pressure to rise → Motor is pressed by internal pressure → Unstable rotation... If open → Although there's a possibility of some water spilling, the motor is stable. Furthermore, the water surface ripples, and cooling effects are also improved by contact with the outside air! ✅Point 2: Wide opening on the back Easy to clean and maintain the electrodes Structure that doesn't trap heat and cools easily during cleaning ✅Point 3: Structure that protects the motor shaft Motor can be removed simply by gently pushing from the back No need to pull forcefully, so there's no worry of bending the shaft and causing "wobble" ✅Point 4: Uses copper electrodes for good electrical conductivity Copper with excellent conductivity is used for the electrode part Solid 2mm diameter for stable contact & high durability Motor cleaning is possible with a stable power supply ✅Point 5: Fits Tamiya genuine spare bottles Reliable design for easily preparing cleaning solution Specifications/Notes Completed product delivered → Ready to use as soon as it arrives, no assembly required If desired, it's possible to reduce shipping costs with non-standard mail (consultation required) This product is only the jig for sale. Spare bottles and motors are not included Please wash and dry thoroughly after use 【About Production】 This product is made with a 3D printer and carefully manufactured one by one. We have designed it with strength and performance in mind. Due to the nature of the manufacturing process, there may be fine molding marks on the surface or small dents on the back, but this does not affect use. We would appreciate your understanding of this as a characteristic of handmade products. Also, if you have any points you notice after use or any requests for improvement, please let us know. We will use them as a reference for future product development. ★Also sold on Amazon