If you already have a reef tank, creating a much smaller aquascape becomes easier and you will not be tempted to deviate from the original design you proposed yourself to achieve. You will also be able to achieve it a lot faster.
I am currently trying to create something similir to that photoshopped picture I posted earlier and I am growing the GSP pieces in my main tank.
I'm up to the challenge. I was looking at how some of my nepthia frags had settled in a new area and they are working at the moment with the design. I'm going to be more aggresive at pruning. I do agree that more restraint and patience is needing if working with a reef. Once something fills out and looks good it may be time for pruning. I doubt my tank will ever have a sharp artistic appearance since the softies I'm working with act more like hippies at a love in.