I had the JBJ 28G, and had a different skimmer for it.
If you use that skimmer, I doubt that you will be able to open the lid. I bought the coralife. I had an older version of this:
http://www.jlaquatics.com/product/ps...65+Gallon.html
Basically I removed the old filter box and placed the pump, which was a MJ1200 in there and then the skimmer just hung on the back. It fit nice, and the lid opened/closed without issue. The skimmer did sit higher than the lid, but oh well, and the skimmer actually worked very well.
I even took it a step further and placed some live rock rubble in that same area on the back just so there was more live rock overall.