hello to all!!! been a while. my sankyo 700 super 8 sound has been running great. i recently changed the rewind belt, was not split, but very well streched outta shape. made big difference for the better. but when rewinding film i notice it is still slow, an when i get to about 20 feet of film still on back reel, rewind comes to a dead stop. really no big deal, i just manually rewind film back onto reel. what could be causing the problem? do i need to tighten something or give a lube job? really don't know. this is a good projector an continues to run well. any help much appreciated. thnx