Jim - One of the issues in the past I had was getting into small areas. Around mirrors and spoilers specifically. The polisher would bump into body and it was just awkward. I was thinking if I separate the pad from the polisher even an inch or two I could get more of the pad under stuff.
I don’t know if the extension will help but I figured if they are cheap enough I would try it for a few minutes. If it messed up the feel of the machine I'd just ditch it. They are only 4.50, I'm bored and unless I prove a thought wrong it will never leave my head.
Funny you say it may mess up gravity. Even the girlfriend who is such a girly girl asked me if the extension would mess up the center of gravity because the machine would be top heavy. I looked at her and asked her where that came from; she's usually talking about making some elaborate dinner.