I have the 3 inch stand offs, a standard DA muffler, and aluminum spinner. The plane was tail heavy so I moved my 2 lithium ion 2400 mah batteries to the area where the landing gear mounts. It's still a tad on the tail heavy side and fly's great. At first I was so concerned about it being nose heavy that I bought a carbon fiber spinner, however with it the plane was too tail heavy. I think the standard muffler made a big difference and believe it or not it looks good.