I bought my Leinbach in '95 and paid $446 with 12" bit.
Never have sheared a pin, have gotten it stuck, (get out the BIG pipe wrench) and had to unscrew by hand.
I usually run my B-2910 at idle speed when using.
After many holes in all kinds of soil the cutting edge wore out.
Called Leinbach and they UPS a new one for fair price.
I would not purchase anything but the 12". That will give some room for adjustment of posts.
I have used mine to break up new flower beds, just drill side by side by side.............
Last one, I thought deeper would be better..... all of a sudden up come water blowing all over the place. Oops, forgot I had run a 1 1/4 pvc pipe to the pond.
I forgot to mention find a place to hang it up when not in use.
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