Step 4: Roughing it up and putting the glue.
The LACK is made of very slippery material so it is very important to rough up the surface before you glue. Rough up all 4 sides of the middle part, and one side of the other 4 parts. Then put on the glue (strong stuff!) according to the instructions on the bottle. Keep one centimeter free on the top of the middle part. The sideparts are glues 1 centimeter lower then the top of the middle part!