A number of models are sculpted in such a way that both of their arms are holding a single weapon. As a result, the arms often have to be attached at the same time or one will discover that the arms do not fit together correctly. The difficulty comes in that with both hands manipulating the models arms, it can be impossible to hold the base down. A slight nudge can cause the figure to slide away and the arms quickly shift out of place.
To solve this problem, I pulled out a tool used in electronics. The device pictured here is called Helping Hands and can easily hold small models steady while attaching arms and other small pieces. Helping Hands can be purchased from a wide variety of places for under Ten dollars.