My understanding is:
The balance gears were engineered back in the 60s to quell vibrations at upper end RPMs.
On the engine I personally removed the gears from, the vibration above 3400 RPM is too much for the BATTERY.
I just kept the top at 3300.
Yes - I do understand that the Sundstrand is rated for 3600.
It doesn't mow, snow blow, or run any other implements, and I don't tax/work/stress the engine much by plowing snow.
My experience and research shows me that the way I'm operating this machine is just fine.
Modify YOUR machine at YOUR discretion.
ALL of mine will be gear deleted.