I'm trying to find a stand for my new 10G nano, and I've found this one that I quite like:-
This is meant for a tank slightly wider, and quite a bit deeper (front to back) than mine, so I'll be hoping to cut down the top piece a bit - trimming a tiny bit off the left/right sides, and then a few inches off the front/back sides. My tank will be less heavy than the tank it's designed for though, as mine's 35L as opposed to 45L. Mine is also a good bit shallower.
Does anyone think modifying this stand in this way will cause any stability problems?