It's been a while since I've made a new lucky 13 skin, hope this one makes up for the wait.
The windows and Headlights will need to be glued in place.
To transform Optimus into the truck, first remove his head and hands then fold the arms behind the body as seen in the following pic
After that, fold the legs back at the waist and turn the feet so the heels touch. If you have any questions, feel free to ask.
Assembly is straightforward for anyone familiar with the Lucky 13 model. If you're not familiar, check out the lucky 13 manual
You will need two of any of the following with [2X] in the title
Lucky 13 Pieces you will need:
ARMATURE
00A04 armature abdomen.stl
00A08 [2X] armature shoulder.stl
00A10L armature forearm left.stl
00A10R armature forearm right.stl
00A15R armature foot right.stl
00A19L armature hand dynamic left.stl
00A21R armature hand grip right.stl
SKIN
The head is a remix of Optimus Prime by Roman and the gun is resized from Transformers Power of the Primes assault gun by lance green
The author remixed this model.