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The bosch aluminum extrusions are not much heavier than the same size square tube with an average wall thickness. The extrusions are great for changing design, quickly adding mechanisms, and moving pieces without drilling. It's a snap to build and makes the whole project more modular. It is incredibly strong too. Also, its only a couple of bucks more than sq. tube.
The only downside is the cost of hardware. Those little brass alloy T-nuts are like 50 cents apiece. There's also the wierd metric hardware that's a little more money and harder to get then American hardware. The joiner plates are just a rip off so we make our own.
For those of you who voted wood, can we see some pics?
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Teacher/Engineer/Machinist - Team 696 Circuit Breakers, 2011 - Present
Mentor/Engineer/Machinist, Team 968 RAWC, 2007-2010
Technical Mentor, Team 696 Circuit Breakers, 2005-2007
Student Mechanical Leader and Driver, Team 696 Circuit Breakers, 2002-2004
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