DIY Cube tank plans..

[Steve-O-]

well some say i need EuroBrace and some say i don't But i want it to be strong Also i did Calculate my thinckness and it came out to 5mm is what i could use thats 1mm i think below so i would use 1/4,
Right now im just looking for that push to say that will work everything looks good so i can get started but haven't heard much yet so now i wait for that person.

Place that im stumped the most on is whats the strongest way to do the base i see there are 2 ways to do this.