OOOPs
I know the feeling well when you make your first mistake or make the first smilie, it really saps your confidence as you are determined to do everything right, been there!!
I have a matching one on my 9A rudder where the gun slipped and a few others on the way to where I am on my build, the dreaded tip-up canopy.
The expression 'move on' I never understood until now which is when your build is finished and painted you will have forgotten about the smilies and the numerous not 100% formed rivets you will have.
Learnt the hard way about not redoing a non perfect rivet, you do more damage replacing it normally and it sometimes isn't any better.
Keep on trucking!!
Duncan