1. Lukes lightsaber still looks green/white. Doesn't match other blue sabers especially Anakin's in ROTS which is the same saber.
2. The green R4 unit, looks weird only because a second before that R2 is all by himself with nothing close to him, then all the sudden there's this mysterious green R4. The only fix I could think would be to digitally cover the R4 with a Jawa or use another shot of R2 standing by himself. But that's just a personal opinion.
3. It looks like right after Greedo bites the dust you see the furry 4 eyed monster in suspenders it looks like there's a purple bar in the middle of the screen. Perhaps that was just me or my tv.
Other than that, this is perfect in every way and I applaud you for such an awesome job!!!