hi im in a position where i can purchase a 2 axes dro for my lathe..........its on ebay for less than 200.00.....the person selling it has good feedback so im not worried about that......i just need to know what length of scales i need for the bed and the cross slide ......they are listed in mm and im not sure how long i should get ......i measured the cross slide its 10" long and the bed roughly is 50 1/2 ...i know i wouldn't need them all the way end to end....im also considering if i want to put a taper attachment on my lathe if that would cause a problem ? the x axes im assuming is the travel down the bed length ways and the cross slide being x .....on the cross slide whether to mount it to the front or to the rear of the cross slide .....any help with this would be much appreciated .............tia ............Eric