CPR No.8 standard window HO Scale

This has a farily close representation of the CPR No. 8 window design.  It is beefed up a bit to be printable, and even at that Shapeways may worry about damage from cleaning support material off the window mullions.  But in actual experience, I get good windows every time.  I clean them with Bestine or just warm water and detergent.  I pint them with thinned water based paints, including craft paint or vallejo paint.  MIG paints have caused the mullions to warp, and I'm not sure why.  

Generally I attach these to a sprue and print a bunch as a single order.