yeap....a bigger spinner or a nose job.
something to prevent the wind from hitting fire wall.
trainers have high drag to begin with anyhow.
i slapp in an o.s. .46 sf on a v mar trainner ..it didn't move.
but it floated n floated n, floated n floated

this 4* .60 flys great with only a .61 magnum

i clipped the wing 3"
took out diehedral
wheel pants
nose job
decent size spinner.
lighten it.

but is still had to experiment with props to match the engine's power
curve and airframe

pic of nose job