This device consists of 5 parts which should be glued together.
You should start from putting Dunker_Base model on the table and checking if Dunker_Wall model will fit the proper slot. If you are sure it fits use superglue to connect them.
Dunker_Top1 model and Dunker_Top2 model should also be glued together, to helpt you align then there are small, semicircles in front. DONT PUT GLUE WHERE THE BACK SLIDER SHOULD GO!
In the end just glue Dunker_Top models on the Dunker_Wall model and glue them together.
Dunker_Slider model should just be slided from the back, there is no need to use glue for that one
Enjoy you nuggies!