Now we are going to attack the wing, the final frontier ...

As depicted in this picture is how the original nacelle looks
and how the modified nacelle looks..

The red arrows show the original lenght of the nacelles...

And the orange arrows show where the motor mounting
rails are pin'd ...

The new firewall is a lot thinner as can be seen here.. As the
motor will be mounted on 'rails' there is no need for a motor
mount and no need for the heavy duty firewall.. Now the firewall
is basically a thin plywood former within the nacelle ...

The 'forward extensions' are tight grain balsa and the motor
mounting rails are attached in a way to make the extensions
stronger.. More of an insurance thing as the motors will not be
mounted that far forward on the rails..