My favorites keyboard was E7:
+ the slider display, very simple to open it by one hand, only one display (do not need two of them)
+ good size of keys, good noic when pressing, good shape of keys, the keys were in good position
- only 4 rows keyboard but it was because of size
Please put the characters back to the left so they are under the right numbersor shift the numbers to the right! This combination is odd.
I understand why you do it but it will be odd.