Paul,
My husband pointed out the same thing: that both are not visible at the same time so there’s no need for them to be mirror image. It is quite possibly something that no one would ever notice once it is finished. But, I would probably still make them mirror image if I had all that talent to make such masterpieces as you have! Perhaps I’m just trying to make you think that I’m not unbalanced! LOL
L/W
“Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety.” Benjamin Franklin