Since I started getting these I picked up some tricks to assembling them.
1. Hair Dryer: For softening up pieces for easier assembling e.g. head and armor parts. elongating belts. etc
2. Black Electrical tape: For fastening down the ends of the net suit when putting on the gauntlets and shin armor so the net suit wont ride up.
3. Paper or thin pieces of card board: Wrap them around the knees of the figure prior to putting on the knee pads. Makes sliding the knee pads up easier since its not fidgeting with the netting. Once its in place (the knee pads) just rip them off (the paper or the cardboard pieces)
Good luck and dont over heat the pieces. They might warp the dread locks ( on P2 and P2 elder) or you might loosen whatever adhesive they used to stick the dreads on the head (which is an easy fix anyways)