It took mostly a lot more practise, but also two firmware updates and a software update to get these results. I printed three more tanks in 1:220 scale (Z gauge), with the intent of seeing how additional details on the muzzle brakes would look, but also to see how tread detail would look. The main takeaway from this is that PreForm now adds unnecessary supports. Both the T-10M and Object 279 suffered from this problem, and the former had lots of scars on the external fuel tanks. The reason it's not here now is simply because the muzzle brake broke off after curing. The King Tiger test print has served its purpose, so I'm printing both Soviet tanks again, just to make sure they will still print after having several supports removed. Links to both of these models will be at the bottom of this post. Enjoy!
Object 279: https://kajminiatures.com/product/object-279/
King Tiger: https://kajminiatures.com/product/tiger-2-production-model/
I recorded the post-processing of these models, by the way, but I probably won't do anything with it. I think I'll save that for a larger batch of 1:285 scale tanks. Before then, however, I'll have something far more interesting to share.