Kevin,
You were spot on, halving the frame rate SLASHED my file sizes correspondingly…and the clips still look GREAT. You’re my hero, no joke.
Interesting info about “key frames”…yeah, I’m used to the term in animation, but I’m sure in the Render Settings menu it means compression key frames as you say. I wonder whether I could save even more file space by fiddling around with them. I’ll give it a go.
Thanks again, this has helped me SO much!