Good start! I agree with what has been said so far. My pennyworth is that the nosewheel steering is far too "twitchy", minor adjustments needed would hardly be seen outside the aircraft; as it is now it would produce a lot of squealing and skidding and wear out the nosewheel tyres in no time at all. Calm it down. Nice smooth movements into and out of the turns. (Yes alright, we had a couple of captains who used to taxy our B4's like you show it, but not for long!).
Good Luck, an interesting project.