Wow! I can appreciate a good custom, but every once in a rare while I get smacked in the face with total awesomeness and just need to take a little step back. This is one of those times.
Dr. Vile over at Hisstank.com has done an absolutely incredible G.I. Joe/Transformers combination custom using a Night Raven and Unicron. This thing is pure insanity. Check it out here. The definition of “kick ass custom”.
EDIT: I thought non-members could view the images on Hisstank these days, but someone tells me that’s not the case. I’ve mirrored the images below: