Thought I'd show how I've mounted my MP4/23 for display. Acrylic case was purchased from a UK Ebay seller; they appear occasionally there. You'll see I separated the engine cover from the model, and mounted the cover to the top of the case. I included a mirror on the back, placed at a slanted angle to give a good view of various model features. Looks really good in person, and very hard to photograph to show the effect!

Thanks and enjoy.