Your fix was brilliant and it looks great too. I probably would have quit with the cardboard! LOL
Many years ago I made a tote for crayons, colored pencils, etc. out of acrylic for my granddaughter who is now 21. It had individual holes drilled for all the different items. I wish I had photographed it but that was, as my grandkids say, “back in the day”; no digital cameras and a stingy grandma who didn’t like to pay for film developing. I really impressed myself with it but she was too little to appreciate it and dropped it down the stairs and broke it. What memories!
“Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety.” Benjamin Franklin