I have 3 DLE-20's and I have found a wood 17x6 prop to be the best for the way I fly. I use a Xoar 17x6 when I can find one or a APC 17x6 if a wood 17x6 is not around.
I just finished breaking in my APC S91a 2 stroke engine and I am getting 10500 RPM with a EVO 14x6 prop. That is pretty good for a 2 stroke 91

.. I am really looking forward to this weekend when I can take this Extra 330s to the field and put her threw the ringers

The plane weigh's in at 8 1/4lbs so I should get pretty good performance.