They ran a basic test filling water at the cleanout and letting it sit via gravity. 

My huge head has its own gravity field!

If they don't like the tree, they should not have bought the house.Leaves fall, that's how trees work, and gravity has been around since they were young (it's nothing new).If it were mine I'd tell them they can get a leaf rake for under $20 on Amazon if they want their own property raked.

I've also spent time reading blogs, listening to podcasts and reading books but you never really know the gravity of what you are getting into until you actually DO IT.

They are old gravity fed ones on large lots.

Plus a golf cart has a lower center of gravity. 

The less the trim has been touched on these, the better, as it was almost always really good white oak when it went in.The vent in pic 6 of 9 indicates an old-style gravity furnace, which means that when you replace it, you'll need a new-style variable speed furnace, which is about 50% more expensive than a standard forced-air furnace.

The wall should be formed and poured all at once.There are several types of retaining walls. 1) A gravity wall is a huge mass of concrete that uses the weight of the concrete to prevent the wall from overturning.

From there it goes into a potable holding tank and gravity feeds into a pressure pump.

You will get a productivity bonus because gravity is helping the machine and the dozing technique will allow you to move more material per set.