I received my new pc 7424 and 6.5 pads Wed. For the more experience users, do you have to use this pc very long for your hands to get used to the vibration or should it not vibrate to the extent that is is quite painful to your hands. I have used orbital sanders a lot and they never bother me but this pc did. I read somewhere about a counterweight for the larger pads but I think mine would have came with the right counterweight since I ordered the kit that had some 6.5 pads with it. thanks for any advice.