Nicely done! I completed a Minicraft T-34B a few months ago, and also encountered nose weight problems. I solved the problem by nearly filling the nosewheel well with Liquid Gravity and then covering it with a small, thin sheet of styrene which I painted flat black to hide the liquid gravity.
Your weathering is great. Weathering is still a bit of a mystery to me. I just watched three YouTube videos about using salt for weathering/chipping, and still don't really understand the process. The models I've completed look "weathered" because of damage from the building process — errant bits of glue, too much/too little sanding, fingerprint in the paint on one, poor spraying/painting technique, incompatible types of paint, canopy scuffs and scratches. But, you know, I'm pretty proud of those models. They sure look better than the mongrel dogs I was building in the 1950s!
I've had a more "intimate" experience with the T-34B than most modellers. See my web page, Surviving a plane crash in the Black Range.
Bob
On the bench: A diorama to illustrate the crash of a Beech T-34B Mentor which I survived in 1962 (I'm using Minicraft's 1/48 model of the Mentor), and a Pegasus model of the submarine Nautilus of 20,000 Leagues Under the Seas fame.