My personal opinion is that if I don't like the the ball at a few different surfaces I'll end the experiment and go on to something else. I usually give it 2 or 3 months. I don't like to change the layout typically, just because it costs me $50-$60 to get it plugged and redrilled and it does affect resale if you try and sell it later on. I know guys like to mess with layouts and such, but I have a few that usually work for me, so I stay with them.
--------------------
-Clint