Here are some pictures. They are too big to upload so I put them on Yahoo.
http://pg.photos.yahoo.com/ph/todd35...?.dir=/a1dcscd
Yes, I had to drill and tap the castings. The X scale is attached directly to the table and for the Y scale I made a bracket out of angle iron that attaches to existing bolts under the left side of the table. Both of the read heads have custom brackets that are bolted to the castings.