Bob,

How difficult is the FS8 to set up, and in your opinion, how well does it work? I also do most of my flying indoors, and the description from fma's website says that it reads the difference in IR signature between the earth and the atmosphere. I'm assuming that means it won't work well indoors? I'm really interested in getting one of these, but I'd rather not drop the hundred plus bucks unless it works very well.