okay thanks for the tip Fast.
regarding the back problems I am hoping the occasional flare issue and the scratching might be due to the roller problem. I unscrewed the roller and bent the tabs back into shape. I will see if the scratching is gone once I run a roll of film through it. As far as the counter engaging, now that I know exactly where the tab is I will just be careful to put pressure there when closing the back up and winding. Hopefully that will get rid of that issue.