I did everything I needed to do in about 4 hours. That thing is pretty simple to operate, I got the hang of it in not too long, not efficient by any means but got it to do what I wanted...
The group of 5 stumps was a pain to get out, they were all intertwined, a couple big roots that went in directions I couldn't get to so I had to cut them with an ax (didn't want to ruin a chain) but persistence paid off, now I just have a mess to clean up...