"Thanks Fred. Is that your interpretation of Steve’s design, ie without welding?"
Fred Klein replied:
Mike...my interpretation for sure...I separated the dolly wheels a bit more for added stability...those slotted framing extrusions are kinda spendy so I substituted 3 x 3 sq tubing where possible, but fully welded per Steve's design...I fitted and cleco'ed everything then gave it to my welder who charged me $30. for 15 minutes work max.