Spar Upgrade Done!
Yes, I have had the spar upgrades done, both CN-1 and CN-2. Keep in mind, EVERY RV-3 is hand made, and not pre-punched. They are all different in some way. In order to complete my spar mods, we had to consult and get approved drawings from Vans, as (go figure) there were some differences in what we found inside my wings when we opened them up.
My plane was built in '84 by a guy who took the initiative and built some strengthening measures into the wings prior to the change notices. My plane is one of the original "Bakersfield RV's" imagined, built, flown and abused by the likes of John Harmon, and my builder Gary Banducci. N66GB was fitted with an O-360 and CS prop and raced at various points in her life, so the measures Gary built in kept it safe all these years, but in order to race at Reno, you have to demonstrate a 4.5 G pull-up, and without the spar mods, these older planes are limited to 4.2 G by Vans. Mine was tested and flown at over 6+ g's so I knew it was safe, but that pesky service bulletin from Vans meant I had to do the changes.
The "parts" amounts to some rivets and screws, and a bunch of angle metal...not much to it. But you have to order "the kits" from Vans, and register as having received them, and then make the required log book entries by qualified person stating that they have been completed in order to return the +6/-3 rating.
Its all in the details. The wings have to come off, which requires disassembly of the whole cockpit, then the wing skins get drilled out and rolled forward to expose the spars. Angle doublers, lightening hole patches, straps and brackets are installed and then you put it back together. It is no small project.
If you want to have it done, you need to find someone to do it...which is the hard part. I have a guy, he is an RV-3 owner and had done it before, so he fixed me up.
Best of luck
Dave