If the leading edge of the sprocket holes are worn/damaged it may be possible to get a good capture by reverse running the film so that the trailing edge of the hole is used as the datum instead. The METS claw mechanism is unidirectional in operation. To get reverse run emulsion side capture I used my Mark 1 system with the film pre-wound on to the feed reel so the last film frame is the first video frame to be captured. The captured video frame images are then numbered by a down counter e.g., Count starts at 5000 and is decremented for each video frame captured, in the capture program. The numbered images are therefore in the correct order for playback inspection using Virtualdub. I normally use Avisynth for final post processing.