A coupling and a process of molding the coupling is disclosed for interconnecting a primary and a secondary tube. Sensors can include an object following sensor, a stairway detector and bumper sensors. Laser brackets mounted on said top plate support fixed lasers for single point layout. In addition, an extendable support, having a foot, is also secured to the electric motor and preferably positioned so that the foot is directly beneath the machine’ center of gravity. As a result, time intervals for cleaning the mold cores are greatly lengthened and a clean and smooth surface of the finished concrete block is insured. Additionally, a system, method, and computer program product are provided for proving a security policy to an interrogator system.