I left my guitar in drop tuning (C) and when I was tuning back up, my high E broke, it was a 9. I decided to try and put my 8 on there out of my pack and that one broke as well (didn't give it time to adjust, it was my fault) so I was out of strings for E. My guitar had 9s, and the corresponding other gauges, so I figured if I put the B string (.11) out of the set of 8s, I could use it until I bought some more 9s. I told my friend about this and he said that the different tensions between the 2 types of strings could warp/bend the neck of my guitar. Is this true, should I take the .11 off immediately?