Closed up my first Warp Nacelle - Mistake!

It's amazing isnt it that you can do something, then the instant you finish you realise you've done it wrong. I guess it's not really that big a deal, the model isn't completely accurate anyway and I'd already decided that I would'nt worry about that this time. But this mistake was easily avoidably, yet at the crutial point I... put the wrong circuit in the wrong nacell, so the buzzard collectors now spin in the wrong direction. Only a Trek fan would notice, but it's annoying all the same. Still, after much grumpiness I think I can live with it.