Ok next thing to consider, The vibration of my BIG gas motor. "Retracts" These are nice quality gear, a couple things that I have encountered so far. On the mains I put a tie wrap on the wire and retract body to limit movement at the solder point. Also at that area I put a dab of silicone on each of the solder points to dampen any wire coming loose.
You will need a sequencer for this plane as well if you intend to have the gear doors function correctly. Sequencers can be purchased cheap like the one pictured above for $10-$15. This one came from HobbyKing. It should come with the kit considering how cheap they can be bought for and one less thing that the modeler would have to try and aquire. (Manufacture take note here).
Next the tail wheel, the strut on the tail wheel that holds the spring is a screw on. Nice for maintnance but it shook apart on mine "85cc" Spring disappeared, anyways I replaced the spring and put locktite on the threads so it will not happen again.
These are things to watch for if you are using GAS.