Next Generation and Harmony Remotes

Hi all, I've been using a Harmony 510 with my Next Generation RF Extender for a while and for the most part, things are working great with my home entertainment center. My only issue is that because the battery bay is located on the bottom half of the remote, where one holds the remote, my hand seems to decrease the strength of the signal and some of my devices do not receive the signal properly. I've gone to the point where I would unnaturally hold the remote along its edges so that I am not blocking the Next Gen battery when I hit the off button to turn off all of my devices. However, the WAF has definitely decreased as a result of this and I am on a search for another solution. Has anyone every noticed this? Do I have to spring for a Harmony 900? Is there a Harmony remote with the battery bay in the top part of the remote so one does not cover it when operating the remote. Thanks for your replies!

It turns out that there was too much interference from my entertainment center. I took the Next Gen RF receiver and placed it away from the entertainment center using a 3.5mm audio cable extender and now everything works great. Hope this helps somebody.