I wrote an article detailing the construction of my model of SLSF 1237 in HO scale. I have attached it here in PDF format for anyone who is interested. If you have any issues with the document, let me know and I'll see what I can do to fix it. I haven't prepared anything like this before, so I expect there will be some problems. Anyone who has experience with creating PDFs, please feel free to give me advice on how to improve the finished product. Edited to add: I inserted a drawing into the article PDF with window arrangements full size for HO scale. This drawing can be printed and cutouts made to attach to your model for cutting out the new windows. Although Frisco cabooses 1275-1292 are not the focus of the article, I included a window arrangement drawing of these cabooses for comparison.