Hi Booski
Can't quite understand whats going on here, any chance you could post a picture or a sketch, are your bedways flat, my tailstock base sits on a flat bed and is located between the bedways with an adjustable piece of square keysteel. the top of the base is slotted @ 90 deg to the ways and the tailstock casting is located and adjustable (for taper turning and setting true) in this slot.
If i can see the way yours is constructed i might be able to offer some advice.
Regards
Mike