What the FAA Inspector had me do on my first KR, a project which I purchased and finished, was to get a letter from the buyer saying that I had done at least 51 percent of the building on it. I think this is in line with what Jeff stated, but you can never tell what the FAA will do, especially in light of the not-to-distant flack over the 51% rule.
See N64KR at http://KRBuilder.org - Then click on the pics See you at the 2012 - KR Gathering in Mt. Vernon, Il MVN 40th Anniversary There is a time for building and it is over. Daniel R. Heath - Lexington, SC