Bought the Flex Edge Adapter to use with 4" pads, it came assembled (shaft attached to plate). Problem is I need to dis-assemble to attach to Flex 3401. Tried open end wrench in vise - attached to shaft and a strap wrench to twist the plate, it wouldn't budge. Any one else have this problem, how did you resolve this? Tried calling 3m, they had no idea, said they would call back, I am tired of waiting. For a dis assemled pic search "3m flex conversion kit EF08"