I have a Saito 72 mounted with the head to the right side. 100% reliable for months. Futaba 3305 servos everywhere but throttle. Don't remember on the firewall, but if there is room I added triangle stock. At least stand it on it's nose and add glue to the firewall joints. I reinforced the gear area from the start and use 8-32 nylon screws with wingnuts inside to hold the gear on. Was able to program elevator servos with radio. I used the ca hinges and pinned with bambook skewer then sealed the gaps. Be sure to balance laterally too.
GarySS posted while I was writing - Forgot I did the 4 - 40 rods all around too.