Yesterday I poured a skin layer of epoxy over the outer side of the firewall. I stood the plane upright and built a Masking Tape dam to hold the epoxy in place as it cured.
After six hours the epoxy was cured and I was able to sand it nice and smooth and flat.
I then did a trial fit of the motor, it's going to be a difficult fit. I need a special length of Engine Standoffs that I ordered from Jeff at Thunderbolt RC.
http://www.thunderboltrc.com/
But they won't be here till Thursday, so I'm moving on the the wings. This will also include a Custom Bash to them.