I decided to expand my layout and lose about 90 square feet of my wood shop. I decided I no longer will not be making much more wooden projects(except for what I need for the DBI RR). I will add a small town with numerous industries to switch, a proper small yard for the DBI RR, a return loop, and a lower level of track for my Thomas trains for the grand kids to enjoy. Photos are included. Any questions just ask. I am still using a Hilti TE52 for drilling holes in concrete. It drills 2 1/2 inches deep x 5/8 diameter in about 1 1/2 minutes. This tool was purchased by my Dad in the mid 1980's for his electrical business and still works like a champ! The expansion is a "Z" because I have to work around the opened garage door in my shop.