You're right, I was thinking it was 13 red and 13 white, but it's actually 7 red plus 6 white for 13 total stripes.
Regardless, I think at this point we have established that red is one color too many. I will probably paint the tail in solid yellow. Might get creative and try to continue the side striping pattern in some manner, but art is not my strong suit. Maybe yellow surfaces with 6 inch white tips separated by one or two blue stripes.
Have vowed not to do anything until next fall, so this is just brainstorming. Gonna focus on flying for about 6 months.