Paul....in most cases you can. Most mounts are set on
the thrust line of the plane....however, if there is right
thrust set up in the firewall....the engine has to be
shifted over to the left (like with the Arresti) for proper alighnment in the front.

See the offset in the front of the cowling....that matches
the right offset of the fire-wall ? With out shifting the
motor over like that....it will never line up.

Forget that aluminum motor mount that comes with the
plane....they look nice, but they are heavy, and don't last.
That's the same mount that comes with the H-9 Ultra
stick. I had one...and it broke two mounts....about five
flights each....for no reason.

See this thread....
http://www.rcuniverse.com/showthread...=&pagenumber=1

You're most welcome....Dave. )