I had the same problem when I was doing with the larger size. But the problem was gone when i removed the SketchyPhysics plugin.
I have new problem (in picture). The green grid is out of way.

Thanks for first answer.

Struna1.skp

I have a problem with Shape Bender. The object is incomplete.
see:

What is wrong.
skp is in attachment.

Untitled.skp