I had a horrible time at 50NL at first too. The 6max tables were so tight it was hard to adjust. Now that Im up to the 100NL tables its back to fishiness and i can build monster stacks at times...but when I hit tables with 2 shorstacks and 2 calling stations I manage to lose a good $2-300 before quitting for the night. In fact, Im going to make a post about this in the SH forum.