George; I have the weights of bare, stock KR2 wing spars if that's of any help to you. Main centersection spar is just a tad over 8 lbs; aft centersection spar is 6 lbs. I know this because I weighed them for shipping to Colin Hales in the UK awhile back. I can weigh the outer spars as well, if that helps; they're sitting in my hangar.
Oscar Zuniga Medford, OR
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