What caps are you hoping to get? If you're fine with a uniform profile (DSA, G20 or SA row 3) and wrong legends or blanks you'll be able to cover it. If you want legends these will be a problem
Escape
Tab (always 1.5u)
Left shift (1.25u ISO or 1.75u usually used for a split right shift)
Enter (usually 2.25u)
:
If you swapped Esc and backspace to ISO enter keys (Esc upsidedown) I think you'd be perfect for caps and the numbers would be nearer normal stagger, but it would be a bit bigger...
Interesting design