Having already made the mistake of grossly overpowering my Arresti, I
can say....don't get too carried away looking for too much speed. They
are suceptable to flutter at high speed....mine almost blew apart. If it
were not for the duel elevators....mine would be toast....[X(]....I have
it fixed, and pretty well sorted out now....

....if I were to do another one, I would put either the YS .63 four stroke,
or my favorite .46 replacement motor....a re-carbed K&B .61 in it.

Dave.