Don't mind at all fella - a compliment if anything
What you'll probably find is that busy shells with flames etc are IMO easier to do as you can get away with it not being perfectly symmetrical. With a very clean 'graphic design' style shell it needs to be spot on or it stands out like a sore thumb !!
I don't do the tracing paper / flip technique when I use liquid mask (as I did with the b4 shell) I just draw everything freehand. On most shells I'm doing now I'm using my own vinyl cut masks