I am waiting for some parts to come in so that I can finish my GP10's. I was looking around and found this photo. MP 531 - a GP18 at Wichita, Kansas - July,1972 - Lee Berglund photo/T. Greuter collection From: http://www.trainweb.org/screamingeagle/loco_1gen_gp18.html Since I model the MoPac as one of my interchange roads I thought it would be cool to have a unique unit on the layout. I realized that I had just about everything I needed, as far as parts, on hand to build this locomotive. The only thing I don't have is the exhaust stacks with spark arrestors. Does anyone know if someone makes this style? I've ordered paint and decals for this unit. I plan on having it ready for painting by the time they get here. MoPac style chopped nose GP18, future MP 531.