I have large 6'x8' fabric shades on geared rollers with a chain. One of the rollers sticks when the shade gets about 2' from the bottom. I've checked the roller mechanism and chain and everything looks ok and it works fine except when the shade nears the bottom. I checked the chain carefully and it looks ok. with no kinks or bumps from the chain connection. The shade isn't bunched against the side of the roller either. It would be difficult to replace the chain device since the bolts are mounted into concrete posts.<div>Thanks, </div><div>DW</div>