Got started on the Buck using 1/4" cold rolled steel rod, It's daunting at first not knowing where to begin and what lines to lay down. Got started with some random numbers, "throw a straight line 4" out adjacent to the chassis, that aught to be enough to fit the exhaust". From there the side barrels could be put in place and then you've got a tangible foundation.
Used these to figure shapes and measurements, making the dimensionally accurate drawings was very worthwhile as numbers can be pulled straight from the page and eyeballed onto the car.
Manufacturers spends millions developing a design, modeling, clay, etc. They don't understand the true power of masking tape and paper.
There are a couple things to change but overall Super satisfying to see your own designs take shape