I just removed my rbta from my 72 bowfront. I bought it and it was about the size of my fist. This was before I started buying sps frags. I let it find a place to settle in and then I started adding sps frags, but instead of glueing the frags to big live rock, I glued my frags to small pieces of live rock. This was so I could move them if needed. My rbta eventually split and I was lucky to be able to remove him. Eventually my rbta grew so big that it was stressing me out. When open it was around 18" and depending on the flow it would sting whatever it could reach. I couldn't move my frags around anymore so the time came for him to go. Removing him was nearly impossible because of how secure his foot was on the rock. IMO do not put an anemone in your sps tank unless you can isolate it completely from everything.
<a href="http://s1324.photobucket.com/albums/u613/crackem/?action=view¤t=B8B2BDF2-AC9C-444F-ACEC-4B62D8CD3F56-7421-00000B1E80658AB8_zps9b55a54b.jpg" target="_blank"><img src="http://i1324.photobucket.com/albums/u613/crackem/B8B2BDF2-AC9C-444F-ACEC-4B62D8CD3F56-7421-00000B1E80658AB8_zps9b55a54b.jpg" border="0" alt="Photobucket Pictures, Images and Photos" /></a>