I have the smaller RS3's and I read somewhere (forget where) to place the woofers in or out based on how far they are from the nearest object or boundary. If the speakers are close to a side wall, then place them in. If the speakers are closer togther but further from a side wall, place them out. I experimented with mine also, but they seem to let you know the best placement because they will become boomy if the woofer if placed too close to a boundary (whether it is a wall, the other speaker, etc.). This probably doesn't help much unfortunately.
