Ben323: This is AMAZING work ...you're 15, really?!?!? most of us old guys would be proud to call these our own.
There's a lot of talent on this forum..be sure to take advantage of the variety of thoughts and styles. If you want helpful commentary and critiques on your builds, I suggest posting in-progress photos. It's more work and it takes more time but you'll find the input to be invaluable. Also, if you have a topic you need help or suggestions just start a thread...like the log chains. There's a wealth of knowledge available here!
ASU-85: Cool subject!, nicely done.
The finish has a bit of a shine, maybe it's the photo but more likely your oil wash needs to be diluted more. You described this as a well-worn finish...actually this would be considered "clean" by most modelers. For comparison, check out any of disastermaster's builds...that's the "well-worn" look! Lastly, You can use necklaces from a dollar store or Walmart for scale accurate chains to secure the log.
Stuart: I applaud the additional efforts...I admire modelers who challenge themself!!
Antennas are easily made by stretching sprue (keyword search-it). You said a "ton-of-dust"..again, this is pretty clean by most standards but you did a real nice job applying the dust...very convincing.
photobooth: Bend (without creasing) a piece of light-weight white cardboard from the arts-and-craft section of Walmart as a backdrop...it's called a "sweep" You'll eliminate the corner shadow effect.
Thanks for sharing your work...you have quite a future as a modeler!