I think i said earlier i just purchased this lathe used and have done nothing with it.No, no real gap.
The tailstock appeared solid as no side to side could be felt. I see that from the back of the tail stock that there appeared to be gaps to the side, but not at the top. There was no side to side play when the tailstock was loosened. I thought about looking at the front left of the tailstock and it was the same appearance. I took off the tailstock and I see what happened. The tailstock has JB weld in the V to keep it from moving side to side. Damn! Previous owner laid plastic over the V, filled the tailstock mating surface with JB weld, locked it down and let it harden. Now I have to be very careful as to making sure everything lines up properly...even though the tailshaft is solid then locked.
I see now why I was able to buy it for less than the price of the quick change tool post and holders that came with it.
I'm sure I'll find some use for it.