You throwin in alot of close rows? your so damn wide its hard to tell.
For my my best thickness gainer is take a barbell and wedge the corner in the corner of two walls , stack on a few plats on the other end stand over it bent over and grab a V pull down attachment and wrap it under the barbell and use that to pull on. ( not sure if you tried this or know what im talkn about, if not lemme know ill get ya a video.
http://www.youtube.com/watch?v=1_NJ7ybVfCw
either way you still got some thickness goin on, good job!
other things like
close grip cable pull overs
even a seated smith
im sure u know most those, they just my fav