I spoke with Bodoodle. They say the 400 does everything the 300 does, even with a lighter than 400 grain arrow. Supposedly the bottom two fins on the 400 come together in such away that they are the same width as the one on the 300. They assured me I would not have fletching issues, and in fact said they' ve shot it with 5" helical feathers, with no flight problems...

Damn. Just what I needed to hear. Now the question is do I go for it in the 3 weeks I have until the season opens or just wait...