Any one ever use a Borit or a Borzit?

[farminghandyman]

Borzit
http://www.borzit.com/door/
Borit
http://www.borit.com/

any oppionions or recomendations?
one over the other?
or do you know of a good diffrent system? and priced according or less?

I have "jetted" before but the problem is if you hit just one small rock or some other hard spot, you basically have to start over or you end up under mining the slab your working on, as you wash out so much material to dis lodge the rock/s and I have had a number of drive ways crack where the jetting took place, (so far no one has complained) as they cracked a time after the jetting was done, but my guess is the jetting is the cause,

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the directions basically say it displaces the soil and will jiggle small rocks out of the way, and not to use so much water as to "wash out the tailings"

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Just looking for more information than what the manufacture gives, and some personal experience if possible.

thank you in advance.

[gspig]

They are both the same. I worked for a man who made his own version of the borers. The body is a water jacket, you put a water hose on the jacket,you put a drill on one end and a digging blade one the other. As the hole gets deeper, you screw on more lengths of water pipe, just like well drilling. The water does wash the tailings out and softens the area being drilled. You want to drill the hole as close to the size that you need, because the hole will collapse eventually.