Tight fit, nicely packaged. I wondering what your cell setup is, did you manage to fit a row of 12 18650 in the W9.2" width of the case? I looks that you have a 12x5 (2x) cell setup.
Interior Dimensions L13.2" x W9.2" x H4.1" | Exterior Dimensions L14.3" x W11.1" x H4.7" | Includes a 1 layer cubed foam insert with base pad and lid foam
Now you make me wonder about having a closed loop inside some aluminium box instead of acrylic box, working as a cooling plate in contact with the outside world…