jimmy,
I am envious of some of your structure...good job. A 'rule of thumb' that I have read it to have no more than 25% of the pond area with structure. Don't forget that this also includes 'natural' structure such as water plants, fallen trees, etc. The goal is to centralize the fish population around a few key areas. With too much structure you end up with the fish being spread out everywhere. Let us know how things turn out!

Sarc