Good show. Clean work.
I wonder if you would have pulled less to break it free if you pulled right above the break, with nearly horizontal line-angle.
That would have certainly taken less force to break. I thought about that, but with only being about a 10 foot drop, figured it would likely only fall off the stump and stay hung up in the forked fir, becoming more vertical and less stable, harder to work with. To be honest, I thought it would come off the stump way easier than it did and that would be the first 'break' in the tree, and that it might simply collapse from there if it were rotten enough. So by setting the line high, if it did just drop and spear or pivot into the ground, remaining whole, I'd already be tied for a second high pull, to break the top out, instead of just trying to drag the butt horizontally across the gravel, tearing it up.
Grand firs are just weird man. I'm sure you know how they can behave, but they can be hard to predict. Some that look like the most rotten, scary things have totally solid wood 2" in, all the way up, others are punky to the core and have 50' of mush on top. Sometimes they will stand for decades, slowly crumbling down, other times they will lose 50' tops, breaking at 20" wood.
Edit: If I didn't have truck access and the ability to put a lot of power on it, I probably would have used a Maasdam and pulled right above the break. If I was out in the woods with nothing but a saw, I would have hit it with the leaning tree and hoped for the best. However after seeing how much stronger that break was than I expected, potentially it would have just slid down and done nothing. Seeing how the top eventually did break out of this, it could have gone in literally any direction, meaning you have like a 60' danger zone which makes safe escape hard. Power from a safe distance was great.