Couldn't you use the old tube and water level method? When the chord at the tip, indicated by the water level, is level then see that the washout chord line at the root, which you can get to, is at the proper angle. I think it is 3.5 degrees up.
See N64KR at http://KR-Builder.org - Then click on the pics There is a time for building and a time for FLYING and the time for building has expired. Daniel R. Heath - Columbia, SC See you in Mt. Vernon - 2005 - KR Gathering