Minor jobs but these were my first orders of business before going too much further building anything. My mill came with a vertical DRO so just needed to add X and Y. I used the igaging units which are inexpensive and as it turns out incredibly easy to install. I cut them to size, drilled and tapped 3 holes for each and that is the complete process. Accuracy seems to be well within the manufacturers claims and I would highly recommend them. I picked up some aluminum to make a guard for the X axis install and may refit a whole new chip guard since the stock one seems to be lacking coverage.
