Below are some photos of a Victorian Railways (VR) D4 tank locomotive which Frank Kelly recently converted from 16.5 mm to P87 18.39 mm gauge. As Frank has told me "...a lot of machining had to be done but enjoyable work."
Frank has spent many years scratch building VR and South Australian Railways steam locomotives in 4mm scale. He is a relative new comer to working on P87 18.39mm locomotives. He's said that he would have got into it a long time ago - amongst other things, he said that prototype designs don’t need to be converted as the gauge (and everything associated with that) is correct scale. Amen to that, Frank.