Hello there, I have created plastic molds before, but all were very simple pieces that were entirely unrelated to any existing toy, but now I want to modify my RTS Optimus Prime (the deluxe sized G2 Laser Prime remake) to have translucent windows. I think the orange Hasbro chose is hideous and the blue Takara chose is better, but confusing. Clear seems to be the most accurate... in my opinion. I will need to completely copy those those pieces. Has anyone done this before? If so do you have any tips? I can find clear to plastic to pour into my own custom mold easy enough, but it's the idea that it has to be an exact copy that makes me nervous to attempt this for the first time. Thanks.