Agree with Q.A.
If you've got enough dam strength and freeboard, more water is great!
No major leaks so far, though it does have a steep 3 to 1 back slope. Water has gotten more than five inches above full pool, including flood event when spillway was roaring, without any problems.
As for freeboard, right now at full pool I have about 2.5 feet to emergency spillway, 4 - 5 feet to top of dam.
Probably my biggest issue will be raising the feeders a bit and making sure the extra water doesn't intrude on neighbors.
