Try taking a look at the side clearance when the screen is up, at mid travel (if you can stop it) and at the bottom. Also, if you have a level check for level conditions at the same 3 locations. Ideally, the clearances will be the same, and the screen will be level. If you find differences, this may be the source of you problems. I have first hand experience with walls that were not exactly vertical or square with adjacent walls. Your observations can be brought to the companies attention, or as mentioned above, you could try another company. IMHO, if the tracks are not exactly the same distance apart and the screen level, the lower guide can jump or jam in the track.
Hope this helps.
__________________
Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
|