KB58 wrote:
The problem isn't tube fabrication, it's allowing (easier) access to the entire circumference of every tube when welding. If the head of the TIG/MIG can't be maneuvered into position, it's hard to know whether weld strength is sufficient.
The angle is pretty much the same whether it goes to a node or stops 4" away. Round tube makes it even easier since you can get the torch closer to the center.
It is purely to make those tube lengths less critical. You only have to be close enough to do it how they chose to. If you're only building one chassis, make it perfect and have it go to the node.