I am a new member.
I have a T680A Amscope. The optics are good and the trinocular I own is great, but they provide little documentation. I have been trying to get an owners manual from China since I bought the scope last Feb. The light stopped working and I felt they set the bar too high for me to send it back for free repair. I have had the scope for 9 months it has a 5 year warranty. I have purchased 3rd party objectives and installed them. I have phase contrast setup. They said in their email that I had to return the microscope exactly as I had received it. I don't have the original packing and don't remember how it was packed. So I am out of luck. If you buy an Amscope be sure to save the packing and remember how it was packed. That way if you need to use the warranty you can.
Dan