With a small piece of plastic processing first inverted "V" shape stick on, but the heavier due to the tray, and the moment is very big, operating a fall off again. After gear made of metal components, and the results after repair effect is very good. The method is as follows: using phi enamelled copper wire 1.0 mm or so, cut a smashing into flat, processing the inverted "V" shape, compared to the original bad tooth (on the right side of the tooth can be the reference length) slightly longer, with a flat iron heating inverted "V" shape top, with a long nose pliers clamp positioning, to melt into to the original tooth height, stop the heating, cooling after coated copper wire contact with the plastic part with 502 glue, dry after use the blade to excess glue. All completed, installed commissioning, tray up F down properly, a levite also normal, LD, CD are normal. Dozen operation, check the gear machining parts, shiftless, offset, loose. The practice proved: with metal parts machining big gear is suitable for the vertical or horizontal radial restore torque is bigger rack and bad teeth.SeLservice manual download site