To make mine more similar to Unite Warriors and the G1 cartoon, I cut out little white circle stickers and placed them on Onslaught's waist. It's way brighter in the pic (didn't even use a flash) so it's not too jarring in person. It's a great mix of cartoon and toy.
In the thumbnail it almost looks like you mounted an LED in his crotch. Which would have been outrageous. Still, neat.