As mentioned by some other posters, I wish I had found this thread a little sooner. It's been useful to have my preconceptions of the build instructions confirmed ie basically they're useless, and it's also good to know that I've managed to get most of the parts correctly installed.
Almost from the beginning of the build I thought the CG might be a problem, so I've done the standard weight saving mod to the tail feathers ( and extended the rudder down to the lower edge of the fuselage so it's more like the full size ). On the basis that it's better to move the battery as far forward as possible to minimise the amount of lead weight that might be needed in the nose, I extended the battery compartment forward by 2 inches. It would have been easier to do this at the beginning of the fuselage build, but I only bit the bullet once everything had been sheeted. However it only took a couple of hours, and it does prove that it's possible to make a fairly radical change to the almost completed structure.
The wings have been modified to use separate servos driving each aileron directly via a pushrod, as well as flaps. I've also put a ply hard point at mid span to attach a wing strut.
Finally, after all the work involved in constructing this "masterpiece" of Oriental model aviation engineering, I had to do something with the nacelle. The front former was move aft by an inch, and soft basla blocks glued to the front, allowing a bit of curvature to be added to the finished article.