Laser technology is expanding in construction, helping bulldozer operators smooth sites. Caterpillar Inc. (www.cat.com) is now offering the AccuGrade laser system, which can guide dozers to create surfaces that have only a 6 mm deviation. Once a transmitting laser is set to the desired elevation, it sends signals to masts mounted on the dozer blade. That input is sent to the controller module, which directs the hydraulic system that moves the blade.
A make-your-own Star Wars Sith Lightsaber hilt is heftier and better-looking than most others out there, according to its maker, Sean Charlesworth. You can 3D print it from free source files, and there's even a hardware kit available -- not free -- so you can build one just in time for Halloween.
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