Really nice looking setup.
I found on my setup mounting the motor as close to the hull as possible helps. I also tilted my motors slightly inward so the props are kind of under the hull a little, (in my case one motor on each side of the boat for balance).
To counteract the motors being slightly tilted (around 5 deg), I add a little extra oil into the engine (synthetic mobile 1), just to be cautious.
Since moving the motors inward and tilting them slightly I have had no issues with cavitation when the boat tilts when on different tacks.
Fortunately you can really hear when the props are cavitating (very loud and you lose power), so if it's happening you know it.
If your props are not cavitating currently when on a heavy tack currently, It's probably not worth the effort to make any changes at all (the mod only prevents cavitation, and maybe just a very slight improvement in steering, nothing else).
I did the same with the motor oil. Use all synthetic oil even the gear oil.