Jim Lahey Rye Recipe Tweakable??

Made the Jim Lahey, "my bread"  Rye recipe, (p.63),  at the weekend & it was very well received.

A visitor took 1/2 the loaf with them!

Anyway, I am wondering if anyone has tweaked his recipe to get more Rye flour into it?

Original recipe is 25% Rye & 75% Bread flour ratio & I know Rye is short on gluten, but I have been asked if I can  knock out a loaf with more Rye by someone who really likes Rye.

Any modifications of Jim's recipe with a higher % of Rye flour out there??

C44