I did it long ago. My machines are all computerized. It doesn't hurt them in the least. Nancy's Notions actually sells a tilt board that is adustable and has cut outs for your knee lift bar, cords etc. The only thing that bothers me sometimes is seeing in the bobbin case when I am changing bobbins or cleaning etc. I have my whole sewing table set up at just the right height where my arms are level with my sewing machine surface when they are bent at the elbow. It does help with fatigue and neck strain. You can accomplish the same thing with door stops under the back of the machine. The tilt table is just more stable and I love gadgets. I don't remember what I paid for it but it has been well worth whatever it was.