DRO display units can be hard to place whlst purpose made brackety can be expensive. It is also neccessary to avoid vibration from the machine itself.
My mounting was instantly made using a TV wall mount bracket bought secondhand at a car boot sale. It also gives the oppourtunity to hang up tools needed for that particular machine and provides a home for a very useful calculator.
The bracket cost the princely sum of £2 and does the job very well. Even new TV brackets are not costly and come with all sorts of hinge mechanisms which will help you find one to suit.
DRO in easy reach, suffering no vibration from the machine itself.