Before assembly, thoroughly clean all parts in warm water with a mildly abrasive cleaner like Ajax, Softscrub or Comet. This will cleanse any additional mold release and allow paints to adhere to the surface. Remove flash or over pour with a razor knife or saw. Additionally, it is strongly recommended that you test fit all pieces before final assembly.
When building the mech, I found it easier to use a hot glue gun on the legs to see how I wanted to position them. Once I decided how I wanted things, I would mark the parts with a permanent marker and take them apart. The hot glue comes rubs off quite easily. Then, I reassembled with a two part epoxy or CA glue.
NOTE: The original build had a hollow torso and the design/balance of the mech was engineered around this. The caster convinced me to cast the torso as a solid piece. This has had the unintended consequence of throwing off the balance. You may have to work with the positioning of the legs before final gluing as my mech had a tendency to want to tip backwards.
Head and shoulders attached
Assembly of the three large lasers. You will have to play with them to get them aligned.
Assembly of the PPC arm
Leg parts: Foot, lower leg, middle leg, upper leg, knee guard and extra shim
The extra shim was included so the builder could position the legs in various walking positions without having to modify the leg parts.
The leg assembled.