Are the 1605 ballnuts all the same dimentions ?
I am searching to buy one. On ebay different sellers have different ref, like ; SF1605 or RM1605.
I am having my Ballnut housing custom made to the correct hight from the ballscrew center to the top of the ballnut housing. So I need to be sure that wherever I buy the ballnut, they are all the same dimentions between each mounting hole. This is my ballnut housing plan below.

Click image for larger version. 

Name:	1.JPG 
Views:	384 
Size:	118.3 KB 
ID:	8562