100 and 300. That's it. Just wanted to make sure. So long as the mains tie, there is no need in that example for the circuit to close from the secondary to a main.

Also, with main bus tie switch to ON, how does that affect auxillary battery power on the left bus vs main battery power when only on battery power. ie, does the auxillary battery power only the left main and essential bus, or will the main battery power both mains, leaving the auxillary to only the left essential bus?

I hope this question makes sense.

Thanks again!