Hi, I appreciate that this is an intermediate course and I have only being using blender for a few weeks. I completed the first part of the course and before moving on thought I would make some comments.
Really enjoyed it but being new'ish I was slow but certainly got there. I liked the style where it was not polished but rather it was you working and me watching and learning etc.
The only sticking point were the new faces in the treads where you deleted the main face but not the edges. I missed that a couple of times and went on a very roundabout route to get it to work before the answer hit me. I have added an image that might help others.
So far, being new I have focused a lot on topology so this was very different from what I am used to and the getting it 'game ready' with ngons and tris was interesting.
Final tank
Thank you for your hard work - big thumbs up