whiplash
I just wanted to say that I also had the same fin problem with my Whiplash. The fins would not fit in the space they were supposed to and it had to be sanded somewhat before they would fit. Luckily, I had test fitted the fin first, so I sanded it before gluing or painting it. I also had a couple of small cracks on each side of the skid plate so I used finish epoxy and 3/4 oz fiberglass to fix it. Now I just have to get my dad to help me build and paint the rest of it (I am not very good at that, only flying it).