Just ordered one for my 40c and will report back if it does or doesn't make a difference. Most of the reviews I've read are very positive with the lone exception I've seen occurring when the user didn't following the instructions for "breaking - in" the device before it's installation and use. And even that reviewer was very happy after he made the specified adjustments etc. So I'm curious if any of you have first hand experience and I'm looking forward to giving it a try myself.