I know that this known problem has been talked about in many threads here, but instead of reviving one from the dead and in the interest getting this info visible to others searching for help I decided to post a new thread here. I myself had the dreaded optical encoder wheel split happen to my DFGT early last year. I came to this site to find out what was causing the symptoms I was experiencing (mainly wheel center alignment issues). So after digging the optical encoder part out and taking a look at it (and making a failed glue-it-back together attempt), I tried something else. A washer. If you look at the encoder it is basically a shaft piece with a wheel on the end. The wheel is solid plastic on the inner part and spokes (encoder) on the outer part. All you need to do to fix it (mine was a complete split down one side) is take it with you to a hardware store and find a washer whose inner diameter is the same size as the shaft, and whose outer diameter is no wider than the solid part of the wheel. I was lucky in that I had one the perfect size in my garage. Slide it on, add a (VERY SMALL) dab of glue on the back to hold it against the solid part of the wheel and you are done. (Just make sure the split parts of the spokes/encoder wheel are lined back up evenly when you do though.) I know the popular solution on here is to order the custom brass one from overseas, and not to take anything away from that guy, but for those of you who are in a hurry or don't have the cash to spare, this works like a charm. My wheel has not had a problem since. Sorry I didn't have the presence of mind to take pics when I had it apart, but if anyone has questions (I know pictures/diagrams are much easier to read than words) I would be glad to help. Hope this is helpful. Update: Added photos below. You can see if you find the right size washer it will hold the split encoder wheel together and then you don't need any glue in the spokes area, just make sure the sides line up. I used a dab of glue on the back of the washer to hold it in place.