Goldwing - Unless I misunderstood what you are talking about when you refer to wing mods, G.P. did the wing mods in later runs of the model so you shouldn't have to do any mods to the wings. There are tech notices from G.P. describing what needs to be done if your model does not have 'UPDATED' stamped in red on the wing half end where you apply epoxy to join the wings together. I just checked mine and fortunately I have this stamped on one of the wing halves. G.P. added hardwood for the interplane and cabbane mounts to help solve the problem of screws possibly pulling out of the mounts as a result of using a larger than recommended gas engine.

I would also pay attention to pinning the firewall and then also adding tristock and fiberglass to the firewall and mounting box. G.P. mentions pinning the firewall, but nothing about adding tristock and fiberglass. It's really easy to do this if you haven't done it before.

On my new Pitts II that I am assembling I could actually see daylight between the fuse and the firewall in areas around where they should have a tight snug fit. Not good. IMHO this wouldn't hold a stock recommended 160 let alone a gas engine. I used plenty of epoxy and tristock to reinforce and close the gaps.

The tech notice states that in future runs of the model G.P. will pin the firewall as SOP in mgf. the model. Mine did not come with the firewall pinned, but I have already taken care of this. I think we can do it better than they can anyways.

Good luck and assemble for strength. Use socket heads for the Interplane and Cabbane struts and throw those Phillip heads away. The heads will strip out so easily, especially if you follow the directions and use CA on the thread holes.