CubeCopter Mk1 (small - medium sized quadcopter)

Why:
I tried one of the small printable quadcopters on here but the arms were constantly breaking and I couldn't get any real flight time. I live in Japan so space is a little limited. As soon as the thing starts to drift in the wind I would try to land, but since I have 0 skill I usually ended up crash landing. Then I:d have to fix it again, and I ended up flying it only 3 times in as many months. Each time it seemed to work a little better, but I finally decided I needed to design everything from scratch and prioritize durability. This is my initial result.

What:
The non-printable parts (besides electronics) are: a 60mm x 60mm x 5mm aluminum block, a 1 meter T shaped aluminum rod cut into 4 equal lengths with a height of 15mm and a width of 13mm, a little double sided velcro strap, and various m2 10 and 15mm bolts and nuts. (fyi, I got all of this at Tokyu Hands)

How:
The motor blocks should just slide right onto the rods, and the blocks are basically "full tang". I put a