7.5 lbsYes, @kingfish254 , this reminds me of OHP's work for sure! I didn't see the shaping of the aluminum tubing, do you use a tube bender like one would for steel? Most shaping of aluminum tubes I know of is the hydroforming method.
Impressive frame design and execution! And a 3 1/2 lb frame is very light. Your tube diameter and clever use of bracing should provide a nice stiff platform for your cycle truck.