If you are thinking about doing one of the models. you will need a few items
Sandpaper, there is small piece in the box, found it too small
I found the corners on some pieces a bit sharp? to fit into the square hole needed a light sand to take the corner off
Bought some hobby files (Supercheap Auto) as some of the holes a bit to tight just need a very light file
Candle wax on all parts to help to slide together
Ian