The castings in the base are slightly above average for a Chinese machine. It has its share of Bondo to hide some of the casting imperfections. However, I would say the table ways and dovetails are tight and well machined. I will also say that the one pump oiling system is a humongous plus. I was able to maintain about .001 On the entire x axis travel. I was speaking to Matt a few days ago about the installation of a DRO I purchased from him and he commented to me he only has one more 835 left. Another shipment is not expected till September. So if you were on the fence, I would act quickly .