Paul:
<br>I was wrong. I did use 3, 10' sections to make mine. You need it to be big enough to allow it to drop over the cat box, and my cat box is almost 10' long. Also, the extra width beyond the sides of the boat are what allow for you to turn it into the wind.
<br>The diameter of pipe is important for getting the hulls above the rocks. Too small and the rocks will stick up past the Heinz thing. Too big and your boat perches so high it rocks back and forth. 2" seems to be perfect. It is large enough to keep the thing from sinking into the mud , but small enough to be manageable with the other considerations. Mine is 1 1/2" and is really too small unless I clear some rocks away from the area and stay out of the mud where it just sinks in... 2" is also the right $$.<br><br>