About this 3D model

This is my second 3D puzzle, the work is done but the print is running that's why there is no picture. I tested it it's work pretty well. Like it's still not done I have no idea how big is it ^^ This model is about 41 cm long 17 height and 14 width Updated : I changed the height to 2,1mm on the STL not in sketchup ;) plz note it ;) To help in build I added the pdf of the plan.