What John said...
I am using Futaba servoes and added 6 inch extensions to mine..
Ad for the gyro, I have a couple of Extra's, 3 Mustangs etc .. They are all tail draggers and no problems getting them to track straight on take off.. I had a Global Decathlon that tracked straight down the runway... The Seagull especially and the Pheonix to a lessor degree seem to be a whole different story.. .. On John's advice I put a gryo in my second one and it made it a much more enjoyable experiance for me..
If I remember correctly the engine measurment on mine is 4 1/2 inches... .. My battery ended up 3 or 4 inches back behind the wing...
John..
Have you flown yours yet ?...
Don't know about Az but the weather here has been terriable for the last couple weeks.. Up to 40 mph winds and raining today... Not Dec weather