RE: Modeltech Extra 300 .30 ARF
Sorry I didn't reply earlier, I was busy getting ready for a trip. Not sure if you got the plane or not. If not, or for others who might buy one, here's some observations on assembly:
1) Make sure you drill the hole for the top cowl screw into the firewall. If you drill it further back, such as aligned with the bottom two screws, you will put a hole in the fuel tank. Don't ask me why I know this :-)
2) I ended up using different pushrod material for the elevator and rudder. The ones that came with the plane were binding in the tube.
3) Check the landing gear screws after the first few flights. They have a way of working loose.
4) With the OS 25 I ended up with the receiver immediately behind the firewall and the battery behind the throttle servo. A heavier engine will require moving the battery even further back.
5) I replaced the wing bolts with nylon ones. Used a tap to cut threads in the plywood.
6) I fly off a grass field so I did not bother with the wheel pants. I also did not bother with the pilot.
7) Drill a small hole somewhere in the cockpit before installing the canopy. This will allow the pressure to escape.
8) Pay attention to the recommended surface throws. The starting ones are more than adequate for the first flights.
9) The plywood for the aileron servo mounts was not thick enough. I had to cut a few more pieces for my servos (Futaba S3004).