Hi Guys, new member, first post. Using the Porter Cable today, thought it was getting hot and the Sonas pad wasn't spinning correctly. I had a look and I had attached the 6" SONUS backing plate with no spacer. How on earth do i get it off without having to angel grind it? The spanner wont go in between the rivets on the plate. Ive tried screwdrivers etc but it just wont budge.

Any hints/tips/tricks or is it angle grind and buy a new one?

I know Im an absolute numpty!

Cheers