Commodore 64 with Keyrah v2 or other device question

[Powerglove89]

If I install a keyrah v2 module or similar on a my commodore 64, how many keys can be registered at once? Could I, say, run forward and angle to the right while holding shift to sprint like in an FPS game (W+D+SHIFT)? I intend to hollow out the commodore and build a mini ITX inside it.

[Findecanor]

I can't find any image of a C64 keyboard PCB with diodes, so I don't think any C64 keyboard is NKRO.
Therefore, the layout of the matrix would limit which keys that could be registered when pressed together. A chart of the matrix was easy to find on Google Image search.
WAS and left shift are on the same row. A and D are in the same column.
Either of A or D would get blocked if you would press both of them while any of the W, S or Shift are pressed. But A and D are opposite directions in WASD so you wouldn't want to press those together anyway.

So, I see no limitation in the C64's hardware for WASD + shift. Unless the Keyrah's microcontroller is programmed like crap then I think it should work.