The main gear is a bit far forward, not terrible though. I can't get a very good view of your tailwheel linkage, perhaps a closeup of that would help. Things I would still like to know: how much rudder throw are you running? How much expo on rudder? What wing cord percentage is the CG?. It would also help if you took a picture of the nose from the top.

Your throttle linkage is a 1:1 ratio between servo arm and throttle arm. The throttle arm only needs to move around 40 degrees to go from idle to 85% opening. With your throttle travel volumes set to 100 the servo should have close to 90 degrees of travel. That is more then double of what you need. My suspicion is that you have your throttle volumes set to 50% or less which effectively cuts your resolution in half. Even worse you could have a large gap in values between high and low. Could you look and see what your throttle travel volumes for high and low are and let me know please? A few pictures of my own. As you can see the gear on my 1/3 scale Reed Falcon are a bit on the forward side as well. Also pictured is the throttle arm on the 70cc twin. Another picture shows where the travel volumes are adjusted to. I do a throttle curve that somewhat acts as expo to soften throttle response around center.