One of the cool things about having the ability to fabricate is knowing that if you need something custom you can build it. It's a blessing as well as a curse though. Plans can become elaborate when there are less restrictions.
Here's a great example: I need a surge tank, but the ones like the one in the picture aren't quite as large as I'd like. So instead making due with what's available, I spend an hour modeling in SolidWorks, half an hour on the water jet, 20 minutes on the press brake, 20 minutes welding and half an hour fitting. Then I'll modify and move the gates from the ATL surge tank to my aluminum one.
Oh well, hopefully the engine will appreciate it.