I like to read other people's modifications for inspiration when I decide I want to modify something . When I decided I wanted a X axis power feed I looked at units ready made and being cheap as dirt I decided to make my own. I knew what I wanted but found no other post with my wants. The difference from all the others I found and what I wanted was I did not like the idea of removing a hand wheel for the power feed. I use the hand wheels on both sides and the vernier scales and wanted to keep them. So I made a unit that mounts on the two bolts for the left side cross shaft support exstending to the rear. It uses a 25 size chain and sprockets to get power to the table side of the hand wheel. There I made a split hub for the sprocket to engage and release the feed. A quarter turn of a socket head bolt. A 12 volt power source, speed controller, power window motor from the scrap pile and a couple of limit switches and I have what I wanted . I did add a bearing to the cross shaft support to aid the steel on Cast iron bearing surface but I don't think that is needed. Just thought others may not losing a hand wheel also and there is a option.