As soon as I saw the cable thing attached to the pivot, I fugured out what you were doing with the throttle being activated by the chunk of wood. Ingenious idea, I'd say. I have about three cords of beautiful cut, split, dried madrone that I have to go in and re-saw now, becaue it's all 26" to 30" long, too long for my new stove.
A setup like this would be ideal to trim about 10" to 12" off all of them. If I had a source of over-length small diameter material, I would probably explore developing something like this.
Criteria would be, it's easier to feed the small pieces of wood into a stationary saw than to position the small pieces of wood one by one into a rack to hold them stationary, and then bring the saw to the wood.
Thanks for showing a new idea! I assume you've used it some and it works well?