I'm currently building Trumpy's 1/350th CV2 USS Lexington. I'm doing it in it's December 1941 configuration with the 8" mounts because that's the easiest paint scheme. All vertical and horizontal surfaces in 5D Dark Gray with a natural Douglas Fir flight deck with no painted markings but, lazy ends there. I'm using the Gold Medal Models photo etch set and the Yankee Modelworks conversion kit which consists of resin, brass photo etch and white metal parts. I'm ready to paint the flight deck but have to wait for warmer weather.
As for construction issues, only the bow area was problematic but, easily fixed. The conversion set resin parts are easy to work with, the PE is good, too. IMHO, the white metal 8" gun barrels leave a bit to be desired but, there are turned brass barrels out there and I may look into getting some. I found my Lex on the clearance table at my local Hobby Lobby for $50 along with Trumpy's 1/350th USS North Carolina for the same price so it was pretty easy to justify the price of the aftermarket stuff. I got the GMM set for the North Carolina as well.