Cripes....if this is "average" I look forward to seeing your work when you feel you've advanced.
As has been pointed out, getting the Gaspatch turnbuckles right and adding the extra plumbing to the engine are not easy or average tasks. Well done.
As far as a critique.....to show a bit more evidence of usage, if that's to your taste, you've made a great start with the exhaust looks and I'd encourage you to try taking it a bit further on the rest of the plane. Maybe some really subtle pin washes around the cowling rivets and seams. It looks as if you did well with the engine, maybe carry on the same feeling on some of the exterior. Maybe try adding a little dust to the tires.
The gang here will tell you that I tend to portray airplanes as really dirty and worn out, so perhaps I am not the best one to give advice. But, I believe even a little weathering, in scale, will really help pop the visual appeal of any model.
Welcome aboard!! I hope others will follow your lead.
Cheers from NYC,
Michael