was it hinged? I do have 0.3oz of robart super hinges in there.

I've been getting some really heavy wood lately... its really been a bit disappointing. The decathlon kit is mostly very dense balsa. I recently finished an RV-4 that consisted of some of the heaviest balsa I've ever built with. And for the changes I made here I ordered wood from National Balsa and received what I'd basically call concrete. I went to my local LHS and grabbed a few pieces but for the most part my thinking was that with the amount of wood I was cutting out I should be well under stock weight.

I'm fairly confident had I used the stock wood in my kit I would have come in at close to 20 oz. I had weighed the pieces separately rough cut and was already around 17.5 oz. 

hmmm.....