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The fabrication of aluminum ( ie tig welding) is expensive if you can't do it yourself. I don't have a tig. Farming out the 'tigging' would increase the price. Also, the aluminum as a material is about 2-3x the price of steel.
I can make the cross tube of aluminum instead of steel, but I'll have to kick down the overall diameter (OD) from 1.5 to 1.05. Same price.
The steel setup pictured weighs about 5-6lbs. I'll try and get a more accurate measurement.
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