I bought this for a job, used it then "fixed it". I had to make a 12" dia. disk, then make slots in the disk.
I had the worst chatter while turning the handle and cutting. Also seemed to have tight spots. When I finished the job, I took the table apart to see if there was anything I find that would cause this, maybe some backlash or something I could fix.
The table works by turning the handle, which drives a worm gear set. The hub of the worm gear is (should have been) bolted to the table top. There are two sets of bolts for this job.
What I found was they had counterbored one of the sets too small. So the socket head cap screw would not down the bore. This in turn didn't have enough threads engaged to hold the hub onto the table and they had all backed out or were stripped out. There is 6 of these screws and one of the six didn't even line up and was missing. The other set of holes had a chamfer on the bottom for socket head cap screws, so the bottom of the SHCS made point contact with the chamfer. The fix was to take the right sized end mill and correct the counterbores.
To finish, I broke all the edges with a file and stoned the flat surfaces.
For the price, some "rework" should be expected. I expected I would have to remove burrs. I didn't expect to have to fix holes. The customer for this table will likely have the skills to rework this table as it comes out of the box.