[MTrenk]

CigaR007:
--> VG's work, but you need to be an engineer or have a lot of time and money to make them work properly unless you have a lucky guess.
--> The deck lid could work just fine, but this forum doesn't have much testing with it either, so the same applies.
--> The Kammback / full boat tail solutions are tried and true on this forum, but I still have to say that not much 'real' analysis has been done, but we all know it works for sure, to some extent based on real driving data.

A lot of people on here are very knowledgeable, but the first rule in problem solving is to never believe anything anyone tells you. Use your mind to think everything through to see if it makes sense. This is the path to becoming the best learner you can be!
You have eyes, you read the report by Mitsubishi, and you'll read the report posted by Chaz... only YOU can decide how to interpret the data. Use your brain!