Full tail articulation for accelerating, added the double gun on the nose, apparently it originally had one i had removed it before. Custom made some short blue laser type pieces to replace the long grey ones that fell off easily. I have 4 yellow tipped rockets installed. Smoothed off the top a little sleaked out the tail fins. Added handles and a computer. And made it so the tail locks straight. Removed the very bottom row to make it more stealthy and added clear bumpers underneath. I really like this. Mega should resell old sets without changing them, some of them.