Just found this thread from researching reamer issues. Hope you got your misaligned tailstock issue sorted out. I had the same issue a while back, turned out all it came down to was a filthy underside of the headstock and tailstock. Once I removed both stocks and cleaned the bed ways with clean rags followed by one last clean rag with actetone, I did the same with the undersides of both my stocks. All of a sudden my Gilette razor blade was vertical instead of slanted when between centers!