You have an extra E25 in your formulas, which was what I was trying to point out, in terms of factoring out that term and having just a + sign instead of doing an extra multiplication by the number of hands (in this case, two).

As a result, the two numbers you're comparing, that are "off" by 42%, are, in fact, off by a factor of sqrt(2) = 1.414.

In essence, you have four E25 in your formula, when there should be only three (corresponding to the h's in my page 20 footnote, of which there are only three).

Don