In my quest for free materials for the furnace I collected bags and bags of aluminum soda cans. I purchased a Can Crusher from Harbor Freight...but it is an ArmStrong unit....use it and you'll be arm-strong!!! USinga air cylinder from Graingers and a Parker valve along with scrap iron bits I built up a suitable Can Crusher using compressed air. See our other fine videos on our website at: www.MarksWorx.com Click on the Furnace link!! Thanks
