What custom mods have you made to your boxes or inserts?
For the first time ever I felt compelled to modify a game box to suit my needs.
I bought #Lux Aeterna so I could have a low footprint solitaire game in my bag when I'm travelling. The box is pretty airy so I took a kitchen knife to it and glued it back together, and I must say I'm pleasantly surprised by the result, which isn't as gruesome as I thought it would be.
The original box:
After some crude butchering: