Very nice work.
I've buit two of these T-bolts and but I built both almost straight from the box. Really nice kits.
I second Nigel about the antenna mast, it's about the only thing in the kit I don't like. As I always end up knocking off parts like that, I usually make new ones from scratch, preferably from something robust likle hypodermic needles.
In addition to the engine cylinders needing some filing to get the cowling fit over them, I remember the cowling sitting a bit too high out of the box. Trimming the locators slightly took care of that.
Not a fit issue, but a thing to look out for is the supercharger outlet under the rear fuselage. As it's part of the fuselage and not a separete insert, there's a hard-to-reach seam in bottom of the outlet. Instead of trying to putty and smooth it, I cut piece of the thinnest styrene sheet I had to neatly cover the area.
Oh, one more thing. With all the nice details you've added to the cockpit, replacing the moulded-in reflector sight glass with a piece of acetate sheet would be nice final touch to the office.
Keep up the good work.
Btw, what paint scheme are you planning to do?
Was this the boxing with the natural metal bird with a bull nose art on the box top?