Saw this on Tformers.com (damn they got some news today!). Anyways, here is a link to a site where you can download all ready made model of a transforming Optimus Prime (in correct colors too!) into your Lego Digital Designer (if you already have it installed). With digital Designer, you can make models on the computer and then buy then direct from LEGO! The price comes out to USD $44.04 + S/H. for 422 parts. Purchasing info, free instructions, and photos of the model are available here: http://pages.cthome.net/pdufilie/lego_optimus_prime.html It's a great base model to expand from. I'm gonna add more details to mine and make as accurate a Prime as I can.