This is the new diamond for my loop/roundhouse steaming bays lead.My friend Bob Anderson donated some rail to me so I named it after him. It is also dual gauged 7 1/2" and 4 3/4" gauge for the loop. If anyone in Arizona has 1" and wants to run on the loop, let me know. I'm hoping to have my 1" steamer fired up by next month. This was a fun project but really time consuming. I hope I don't have to build another one.