Rex, can't wait to see what you do next on your MBT-70! It's one of my favourite Cold War tanks along with the M60 and Leopard 1.
I've made more progress on the turret. Since the last update, the upper and lower armor plates have been built and installed. I made sure that the lower side plates curve up at the right angle:
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Nate ... I got sidetracked on the MBT 70, but should get back to it soon. The framing on the inside of your turret looks better than the exterior plating on mine ..... yours is neat, clean, straight ..... the inside of my turret looks like a train wreck in comparison. I always think, "If I won't be able be able to see it when the paint is dry, why bother trying to make it perfect"? (It's a good thing I never became a doctor). Your build is beautiful..