On 06/16/2014 05:11 PM, David Hare-Scott wrote:

Why ellipses? Why four? Curves are inherently harder to build than
rectangles or near rectangles. Easier with blocks than timber. Unless
your ellipses are very narrow it will be hard to reach the middle of the
fat part

Long rectangles with rounded edges. Depending
on the price of the rounded end pieces, I may
go square