OK, talked to a mate at work regarding my results shown above. Basically he said to look at the results like a scaled graph, it's scaled up so you can see it more easily but the actual numbers are the important thing. So, it could be that it's only deflecting a tiny bit, but scaled up it looks horrific. Also, I used a distributed load rather than a point load, I kind of knew this at the time but couldn't find the correct option, just wanted to see some results :P

Looking forward to chopping it apart tonight for the next version.