I would like to eventually get into tree removal and stump grinding so last week,just to get some experience,I rented a Vermeer sc252 and removed a couple of stumps for a neighbor.One was very small,rotten and no problem.The other,which was probably 2 ft. in diameter and 8-10 inches above ground,took 1 hr. and 45 mins.It wasn't at all difficult or tiring,just took a long time and I was wondering what I did wrong. I'm sure that cutting it level with the ground with a chainsaw would have speeded things up but I don't have one big enough to do that.Also,the job produced so much saw dust I had to stop several times to remove it.The stump grinder appeared to have alot of miles on it but seemed to work OK.I had to go veeerrry slowly,though.I cut the stump about 6 in. below the gound. How long should a job like this NORMALLY take with this particular machine?Even though I lost money I don't regret doing it because I needed the experience.Plus,the customer was happy.Thanks.