First, I needed to completely disassemble and clean crud from all surfaces. cleaned all threads; honed ways, dovetails and gibs (which also spent the night in Evapo-Rust); lubricated all moving parts; adjusted the preload on the thrust bearings; reassembled and adjusted gibs. Now it works very smoothly and as accurately as I expected. This product is a beast and is worth the money if you have the time to work on it before use.Problems I encountered beyond the above: one of the 4 mounting holes apparently lost its sand during casting, so I had to drill it out, the hand wheels are very wobbly (but usable), and there was a lot of red paint on machined surfaces.