Several years ago I purchased an Optoma EP745 projector. The color has not been good for the past few years. After doing some research on line I was convinced the color wheel was not working correctly. I found several sellers from $45 to over $100, I decided to purchase it through Amazon for reliability. I am glad I did. The wheel arrived on time. Was not quite sure on the instructions and after contacting the seller via email I got a response back with in few hours with help. The color now is working. Good for another 10 years.