I said the same thing with my box. and if i was to go back and do it all over again, that would be the only thing i would change. those fuking rings are such a pain in the butt. If they were prefect round my box would have turned out so nice. I don't have a router or a perfect circle but now i think its a wise invest for the small details. Someday i'll buy one.
Granted your just making kickpanels but you'll still look at them and thats all you'll see.
Good luck, they look pretty good.