| I wouldn't say it's *necessary* as plenty of people swear they can't tell the difference, but *I* use a 6" counterweight with every size backing plate and pad (even the 4" ones).
Note that the counterweights are designed to go with a backing plate that has a single sheet of sandpaper on it. Any foam pad, let alone wet with product, is gonna weigh more than a piece of sandpaper.
Counterweights are cheap and easily changed. The pn for the 6" counterweight was 699933 the last time I ordered one. I got mine from PC at (888) 848-5175 but you can find them other places too. |