I got this to replace the tailstock on a 60+ year old Dewalt Lathe.  Works great, and was a perfect fit, except for one problem.  The end plate that covers the internal bearings unscrews while it's being used.  No idea if it was properly torqued from the factory or not, nor do I know what torque it should be at, nor a tool to tighten it properly.  I put a dab of BLUE locktite on the threads and tightened it down as best as I could.  Hopefully that keeps it from coming loose again.