This is the finished re-purposing of a hospital medical cart that I bought surplus for $30. Material costs were kept to a minimum by using bed frame angle iron and 1 x 4' length of 1 1/4" box section for the bottle holder. Total material cost $20.
The position of the extending knuckle dictated that the bottle be in front of the cart for C of G purposes. The vertical adjustment allows precise set up and control from the front of the machine.
Rod storage was by reaming out a 3/4" conduit joint and clipping these to the cart with conduit clips so i can still see the rod specs. The maneuverability of this is awesome.
Those wheels are set at an angle and actually are not under much stress. They are set like that to allow a tight turning radius They have solid tires and are spoked hard plastic with ball bearings pressed in. The forward swivel castors are lockable. I should have posted better photographs.
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