So far the biggest thing I’ve noticed is that it has a much better center of gravity than the M03R. Yesterday I was at the Tamiya Track in Aliso Viejo, CA to compare the two. Using the Type-A 60D slicks with hard inserts my M03R with a LIPO would flip around “SUV style” when cornering hard. I then switched the tires over to my M05 with a 5000mAh NiMh battery in it and it didn’t flip at all. I then switched the type-a’s back on the M03R and also put the same battery in it. It was a little better, but would still flip over.