I have a new keyboard connected to my macbook (high sierra) that I'm currently adjusting, and I would prefer if the first key to the right of the spacebar was an option key and the next a right ctrl key. I know that the modifier keys can be changed in System Preferences > Keyboard > Modifier keys, but that does not let you change the left and right sides independently: the two keys closest to the spacebar stay the same kind no matter which kind you choose, and I want the first key to the left of the spacebar to remain a command key.
I have used Ukelele before to modify the layout of the rest of the keyboard, but as far as I know, you can't change the modifier keys with it.
Is there any way to make this custimization? It can't be a limitation to the hardware, right..?