Adding movement to the soldiers

i tried to add flexible joints to the soldiers.
firstly i tried heating the shaft of a drawing pin. and i then inserted it into the soldiers arm sockets. this worked however the shaft quickly lost heat and i couldn't afix the arm in time. i then tried using a small drill piece and then a heated pin to create a hole. However the hole was too small to fit onto the drawing pin shaft. With the drill piece i managed to make it fit but the arm and torso had warped with heat so the movement was poor. I think that it would perhaps be worth making a few pieces slightly more animatable. I also tried removing the limbs and using bluetac but that looked pretty messy.