I started mine about 6 years ago. Still have had only one short aborted flight which ended with broken gear rails. It does look like they've improved the lightening holes. I added extras to mine as well. Thinking about it, I think I may have even trimmed a bit of balsa from the inside of the ribs, but just a little bit. It was my first build, and I ended up with a little (read way big) twist in the rudder. Also, there was an issue raised not too long ago about a descrepancy between the written instructions and the photos when mounting the Horizontal Stab. They don't match, and if you follow the wrong one, you end up with an incorrect incidence for the Horizontal Stab. Keep a close eye out for that.

Scott