Thanks guys I started using a wide grip. I thought I'd hafta decrease the weight but I'm suprised that I'm actually stronger than before from the start!
I definately feel it more in chest and less in my triceps/delts which makes sense... However, I'm not sure if I'm tucking my elbows enough? It may be because I'm 5'6" (short arms) or just because I'm used to tucking them in *more* when I used a closer grip.
It is not good wide grip is really more dangerous for tears if you do heavy bench press