Price is decent, plate mounting distribution is nice.
A few gripes however, the sides are a main selling point yet there's no renders of a proper side profile of the keyboard, only slightly in the exploded view of the board. Moreover, 8 internal screw points is rather overkill in a design like this, specially when it's a "seamless" design; could get away with 4 and save a little bit of unnecessary machine time as well as reducing possible points of failure in production.
On top of providing a proper side profile render, one of the bottom would be nice as there isn't one in the post (at least that I can see). Also, you say the front height is 18.9mm but where is this measured from? An effective front height would be nice to have as I assume 18.9 is the height of the front lip.
Finally just a minor concern that you might want to check just in case, make sure to measure the bottom of the screw holes on the lower side of the case bottom to the other side. That part looks awfully thin as it is so it may cause issues down the line if the material at bottom of the screw hole is under 1mm in thickness.
Overall, not really my thing but I appreciate the pricing as well as some elements of the design. GLWIC