HAVE JUST PURCHASED THIS ITEM FROM EBAY WITH ASSURANCE IT WAS WORKING FINE. ONLY TO FIND THAT THE SLIDE CARTRIDGE ACTION VERY STIFF AND DOESN'T SEEM DESIGNED WELL ENOUGH TO DO THE JOB SMOOTHLY, IF AT ALL, WITHOUT 'CRUNCHING' UP MY SLIDES. I AM BEING GENTLE AND PATIENT WITH IT AND FOLLOWING MANUAL INSTRUCTIIONS BUT NO JOY. WHAT COULD I BE DOING WRONG OR ARE THESE PROJECTORS NOTORIOUSLY, POORLY DESIGNED? THANKS, DAVE