Building the J - Decker model is fun and easy. First, carefully follow the instructions to assemble the parts and build it into a police car. Then, when you're ready, transform it into a robot. To combine it with J - Loader, just match the connecting parts as shown. When handling the model, be gentle to avoid breaking any small parts. Store it in a dry and cool place to keep it in good condition. And if you have other SMP J - Decker releases, feel free to connect them and see new combinations!