Petrol smells probably indicate a small leak, somewhere. I haven't had any smells on my S4.
Re the alignment, I had a few issues with my new car - notably the boot lid and the drivers door.
My mechanic (in NZ) went over the car very thoroughly and found a few loose nuts and corrected the alignment. This fixed most issues. It is definitely a hand build machine, so a few fixes is likely to be the norm.
You are right - there is no other car quite like an Aero 8.
Go for and enjoy.
