Hi Jeff.  Wayne told me to make the elements just like you would a regular 
yagi. 5% shorter for directors and 5% longer for the reflector.  Piece of 
cake!  I have made several yagis and quads for 2 meters.  I love antennas!
Oh, spacing would be like a regular yagi, also.  About .15 to .2 wavelengths.
Hope this helps!
73 de Stan
KC5BFA
--- GEcho/386 1.11+
---------------