I have a Porter Cable RO polisher and it came with the 6" pad and I have the 6" hook & loop arbor attachment. I notice that some folks are using the polisher with smaller 5" pads and was wondering what, if any, advantage the slightly smaller pad provides. I understand that the balancer has to be changed, and it turns out I already have the 5" balancer in my kit, so it's just a matter of a new hook & loop and some pads. Any clear advantage?