KR> AS504x airfoil

[Jim]

I'm currently building a KR2S and I'm about to put the vertical member in the 
fusalge that the main and rear spar go through. I tried to download the blue 
print for the AS504X wing how ever they were so small that I couldn't read off 
the paper.
Which airfoil has been used the most, and how high up from the bottom longeron 
do you put the diagonal pieces that fore and aft? Would anybody have the latest 
information on the different flight characteristics of each airfoil or where I 
may find it? 
                                               Thank you,
                                             aerobeale