I was trying to do this in my kit and it just wasn't working. I think I looted one of those Bricks from the Warrens, so I went and got one from Crushbone and that still didn't work, so I just started taking things out one by one and trying the combine.
It ended up working with only 1 Wasp Wing in the kit, not two. I still had 1 wing left over. Not sure what's up with that, but that's how it worked for me.