Little help here......

When fishing harnesses off the riggers.....

How far back? Can you run a harness "too far" back?

If I ran a harness 175' back, and 40 down, what would be the true depth of the harness....... Do they run higher than the cannonball, or lower than?

Does anyone fish flatfish type baits off the riggers(or leadcore) with crawlers on a hook?