Does anybody have a video or sound clip from the 180° header car that Renegade Hybrids (or anybody else) built?
If you are planning to build your own, there are now header modelling kits available from a few companies like
https://www.icengineworks.com/how-it-works/ that will make your life a lot easier. They are not cheap but will save you dozens of hours, and you could buy it used and then sell it afterwards to another builder.