To much questions to respond....just check out the reviews at their site for technical information. You will see different reccomendations, positioning, how they work, what to expect and so. Also, go to www.audioasylum.com and search at the tweaker asylum under Room Lenses. Check the Jon Risch site too. You will see discussions on every question you may have.
...and yes, they work but don't need to be the original ($399.00/each) RL...the DIY version will do the same.
...and yes, they work but don't need to be the original ($399.00/each) RL...the DIY version will do the same.