SD Prime bada bada baam

SD prime for a challenge on the Allspark. I'll post the actual "image" he's a part of later(original image had Prime, Bumblebee, Megatron, Starscream, Grimlock, Roller, Rumble, and Soundwave((in transformed mode)) fighting some common enemy...had to cut it short for the challenge deadline).

Things I don't like? There are a few- but this came out pretty nice.
Pencil sketch- scanned and then ink and colored in Photoshop.
(and I didn't put a preview on it because I it's not THAT big, but full view would be appreciated).