Stackhouse wrote:So I found a tubular chassis design ...
So, if I understand correctly, what you're saying is that you found a design that you it is impossible to get dimensions for, and you want to get dimensions so you can build it.
...Design your own? Read "Racing and Sports Car Chassis Design" by Costin and Phipps, and do the rest with a pen/pencil, paper and a good table. Men were sent to the moon without Solidworks, not having access to CAD software is never an excuse.
But that aside, I don't understand your situation; what do you mean you "found a tubular chassis design"? Do you have a drawing? a cad model? A magazine clipping? What do you mean by "transferring this design into my own"? what do you need to start building? What are you trying to accomplish?