rear spar mod on RV-3

Getting close to hanging wings on older RV-3 and I have a question, Might be a dumb question but Is there a rear spar mod on the RV-3?? I have read on some web pages that someone has done the mod and I can not find anything in print about what the mod might be. Can someone enlighten me. I have done the main spar mods. Thanks for any info

Perry

Safe to assume you've seen this:

http://www.romeolima.com/RV3hq/Info/info.html

Tony

Thanks Tony

Thanks Tony, I have looked at that sight more than once and I guess I never took time to pickup on the CN-1 rear spar info. I have it now
Thanks again.
Perry