XRAY T3 / T4 accu holder V1.2

If you don't like using tape to mount the accu to your car, you can print this reusable accu holder. This holder was made for GENS lipo accu types.
Version specific:
V1.2: On the top are slots on both sides. Put some velcro tape into these slots and fix it with some clue (best is 2 components glue).
v2.0 There some minor design changes to protect the accu box from damages. Also I decide to use rubber bands instead of velcro.
v2.1 Made some optimizations to make holder more robust.