I very much doubt that you could top the
Orlik Sopwith Triplane model. It has a complete inner wing & fuselage structure, enabling you to make a really advanced cut-away model, as well as simpler versions.
The version modeled is Raymond Collishaw's "Black Death", and the scale is 1/25, and very appropriately so in relation to the level of detail. If you really, really wish to build it in 1/33 and nothing else, you'll have to scan it and print at 75,8 percent (or 75 percent; i.e. 3/4 of the original size).
- L.