Reliable Diesel Engineers [P] Ltd. Manufactures Custom Configured Optimized Enclosures. Reliable Diesel Engineers [P] Ltd. Holds ISO 9001:2000 quality assurance certifications. Custom Configured Optimized Enclosures offers technical solutions for productive, space-effective and reconfigurable enclosures. Custom Configured Optimized Enclosures are flexible systems which are tailored to individual customer requirements to ensure complete satisfaction and maximum value. These enclosures are used to solve the storage problems backed by skilled CAD engineers.