I my eyes, these important locomotives have turned out pretty well in their rendition by Caledonia Works. Introduction to the class: https://en.wikipedia.org/wiki/LMS_Princess_Royal_Class Shop page with screenshots of all variations (and there are a lot!): https://caledoniaworks.com/product/lms-princess-royal/ Price GBP 25 seems appropriate for 'pro' quality. Video reviews: (if you can stand the babbling authors of these live streams) Original footage inclused in these videos: "Study in Steel" vintage 1951 LMS documentary: