I got the recall work done a couple of months ago and have been using the mower so far this season. Today a roto-stop problem cropped up. It seemed like the blade was not fully engaging and smelled like something was burning. I adjusted the free play in the cable and noticed the brake plate is not returning to the completely open position when the tension is released on the cable. I haven't taken it apart yet, but can't see any reason why it is binding. The return spring seems to be in place. I also found some metal shavings near the bbc mechanism, so that's not good. Any ideas what happened and where to start fixing this? I think I have the blade clutch free play adjusted but it seems to have more free play than it should because the plate isn't returning.