I figured I'd try posting some pics as I'm grinding some stumps. Im posting from my phone as I go so hopefully this works.
Here is the first one, a small old oak stump.
Okay this one is gonna take a while, I started grinding this las month but got side tracked when the wife showed up with beer.
I would normally take a stump like this down close to the ground with the chainsaw then grind it, but just for fun I'm going to see how long it takes, starting now.
You said you were going to see how long it took. So how long did that big one take ? According to your post times it was 36 minutes. Just curious. It does a good job.